Common Weakness Enumeration
CWE-306
AllowedMissing Authentication for Critical Function
Abstraction: Base · Status: Draft
The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.
4625 vulnerabilities reference this CWE, most recent first.
CVE-2026-20326 (GCVE-0-2026-20326)
Vulnerability from cvelistv5 – Published: 2026-09-16 20:02 – Updated: 2026-09-18 13:41
VLAI
EPSS
VEX
Title
Cisco Nexus Dashboard Software Security Hardening Release September 2026 - Missing Authentication for Critical Function
Summary
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Nexus Dashboard engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities.
The vulnerabilities tracked by CVE-2026-20326 are related to missing authentication for critical function issues that are grouped under the Common Weakness Enumeration (CWE) CWE-306.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-18 03:55 UTC
CWE
- CWE-306 - Missing Authentication for Critical Function
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Cisco | Cisco Nexus Dashboard |
Affected:
2.1(1d)
Affected: 2.1(1e) Affected: 2.1(2d) Affected: 2.2(1h) Affected: 2.2(1e) Affected: 2.2(2d) Affected: 2.1(2f) Affected: 2.3(1c) Affected: 2.3(2b) Affected: 2.3(2c) Affected: 2.3(2d) Affected: 2.3(2e) Affected: 3.0(1f) Affected: 3.0(1i) Affected: 3.1(1k) Affected: 3.1(1l) Affected: 3.2(1e) Affected: 3.2(1i) Affected: 3.3(1a) Affected: 3.3(1b) Affected: 3.3(2b) Affected: 4.0(1i) Affected: 3.3(2g) Affected: 3.2(2f) Affected: 3.2(2g) Affected: 3.2(2m) Affected: 3.1(1n) Affected: 4.1(1g) Affected: 4.2.1 |
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CVE-2026-20253 (GCVE-0-2026-20253)
Vulnerability from cvelistv5 – Published: 2026-06-10 17:16 – Updated: 2026-06-19 03:55
VLAI
EPSS
VEX
Title
Unauthenticated Arbitrary File Creation and Truncation in a PostgreSQL Sidecar Service Endpoint in Splunk Enterprise
Summary
In Splunk Enterprise 10.2 versions below 10.2.4 and 10 versions below 10.0.7, an unauthenticated user could create or truncate arbitrary files through a PostgreSQL sidecar service endpoint. The vulnerability exists because the PostgreSQL sidecar service endpoint lacks authentication controls, allowing any network-reachable user to invoke file operations without credentials. Splunk Enterprise versions 9.4 and earlier are not affected. If you cannot immediately upgrade to a fixed version, you can mitigate this vulnerability by disabling the PostgreSQL sidecar service.
Severity
9.8 (Critical)
SSVC
Exploitation: active
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-10 00:00 UTC
CWE
- CWE-306 - The software does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://advisory.splunk.com/advisories/SVD-2026-0603 | |
| https://labs.watchtowr.com/why-use-app-level-auth… | exploit |
| https://www.cisa.gov/known-exploited-vulnerabilit… | government-resource |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Splunk | Splunk Enterprise |
Affected:
10.2 , < 10.2.4
(custom)
Affected: 10.0 , < 10.0.7 (custom) |
Date Public
2026-06-10 00:00
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CVE-2026-20223 (GCVE-0-2026-20223)
Vulnerability from cvelistv5 – Published: 2026-05-20 16:06 – Updated: 2026-05-21 03:55
VLAI
EPSS
VEX
Title
Cisco Secure Workload Unauthorized API Access Vulnerability
Summary
A vulnerability in the access validation of internal REST APIs of Cisco Secure Workload could allow an unauthenticated, remote attacker to access site resources with the privileges of the Site Admin role.
This vulnerability is due to insufficient validation and authentication when accessing REST API endpoints. An attacker could exploit this vulnerability if they are able to send a crafted API request to an affected endpoint. A successful exploit could allow the attacker to read sensitive information and make configuration changes across tenant boundaries with the privileges of the Site Admin user.
Severity
10 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-20 00:00 UTC
CWE
- CWE-306 - Missing Authentication for Critical Function
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Cisco | Cisco Secure Workload |
Affected:
2.2.1.41
Affected: 3.2.1.18 Affected: 3.3.2.50 Affected: 3.4.1.28 Affected: 3.4.1.34 Affected: 2.3.1.45 Affected: 2.3.1.41 Affected: 3.3.2.28 Affected: 3.1.1.59 Affected: 2.0.2.20 Affected: 2.1.1.33 Affected: 2.1.1.29 Affected: 3.2.1.28 Affected: 3.4.1.35 Affected: 3.1.1.65 Affected: 3.1.1.67 Affected: 2.0.1.34 Affected: 2.3.1.49 Affected: 2.2.1.39 Affected: 3.4.1.19 Affected: 3.3.2.23 Affected: 3.1.1.61 Affected: 3.1.1.54 Affected: 3.5.1.17 Affected: 3.3.2.33 Affected: 3.5.1.1 Affected: 2.3.1.53 Affected: 3.5.1.20 Affected: 3.5.1.30 Affected: 3.3.2.16 Affected: 3.1.1.55 Affected: 3.4.1.6 Affected: 2.3.1.50 Affected: 2.3.1.52 Affected: 3.2.1.19 Affected: 2.2.1.35 Affected: 3.1.1.53 Affected: 3.1.1.70 Affected: 3.2.1.20 Affected: 3.5.1.2 Affected: 1.103.1.12 Affected: 2.3.1.51 Affected: 3.3.2.42 Affected: 3.4.1.1 Affected: 3.3.2.12 Affected: 2.1.1.31 Affected: 3.5.1.23 Affected: 3.3.2.53 Affected: 3.4.1.14 Affected: 3.3.2.2 Affected: 3.4.1.20 Affected: 3.3.2.35 Affected: 2.2.1.34 Affected: 1.102.21 Affected: 3.3.2.5 Affected: 3.5.1.31 Affected: 3.6.1.5 Affected: 3.2.1.31 Affected: 3.5.1.37 Affected: 3.4.1.40 Affected: 3.6.1.17 Affected: 3.6.1.21 Affected: 3.2.1.32 Affected: 3.2.1.33 Affected: 3.6.1.35 Affected: 3.6.1.36 Affected: 3.7.1.5 Affected: 3.6.1.47 Affected: 3.7.1.22 Affected: 3.6.1.52 Affected: 3.7.1.39 Affected: 3.8.1.1 Affected: 3.7.1.51 Affected: 3.8.1.19 Affected: 3.8.1.36 Affected: 3.7.1.59 Affected: 3.8.1.39 Affected: 3.9.1.1 Affected: 3.9.1.10 Affected: 3.9.1.24 Affected: 3.9.1.25 Affected: 3.9.1.28 Affected: 3.9.1.38 Affected: 3.8.1.53 Affected: 3.9.1.52 Affected: 3.10.1.1 Affected: 3.9.1.64 Affected: 3.10.2.11 Affected: 3.9.1.66 Affected: 3.10.3.19 Affected: 3.9.1.69 Affected: 3.10.4.8 Affected: 3.10.5.6 Affected: 4.0.1.1 Affected: 4.0.2.4 Affected: 4.0.2.5 Affected: 3.10.6.3 Affected: 3.10.7.4 Affected: 4.0.3.13 |
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CVE-2026-19971 (GCVE-0-2026-19971)
Vulnerability from cvelistv5 – Published: 2026-08-17 01:30 – Updated: 2026-08-17 16:03
VLAI
EPSS
VEX
Title
LB-Link WR1210M Backup Endpoint backup.cgi main missing authentication
Summary
A flaw has been found in LB-Link WR1210M 1.0.3. This impacts the function main of the file /www/cgi-bin/backup.cgi of the component Backup Endpoint. This manipulation causes missing authentication. The attack is only possible within the local network. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-17 16:01 UTC
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/391148 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/391148/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-19971 | third-party-advisory |
| https://vuldb.com/submit/873139 | third-party-advisory |
Impacted products
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CVE-2026-19908 (GCVE-0-2026-19908)
Vulnerability from cvelistv5 – Published: 2026-08-14 20:00 – Updated: 2026-08-17 19:52
VLAI
EPSS
VEX
Title
PAX Technology Q80 XCB Daemon Missing Authentication Vulnerability
Summary
PAX Technology Q80 XCB Daemon Missing Authentication Vulnerability. This vulnerability allows network-adjacent attackers to disclose sensitive information and modify configuration on affected installations of PAX Technology Q80. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the XCB daemon. The issue results from the lack of authentication prior to allowing access to functionality. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of root. Was ZDI-CAN-30584.
Severity
7.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-17 19:51 UTC
CWE
- CWE-306 - Missing Authentication for Critical Function
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.zerodayinitiative.com/advisories/ZDI-… | x_research-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| PAX Technology | Q80 |
Affected:
2.6.33.6690R
|
Date Public
2026-08-14 20:00
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CVE-2026-19875 (GCVE-0-2026-19875)
Vulnerability from cvelistv5 – Published: 2026-08-19 17:38 – Updated: 2026-08-20 15:57
VLAI
EPSS
VEX
Title
Unauthenticated Registration POST Endpoint Permits Admin Email Overwrite and Outbound Relay Abuse in Langflow
Summary
IBM Langflow OSS 1.0.0 through 1.10.0 could allow a remote attacker to overwrite administrator email information and abuse the server as an outbound relay due to missing authentication for the registration endpoint.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 15:40 UTC
CWE
- CWE-306 - Missing Authentication for Critical Function
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.ibm.com/support/pages/node/7283810 | vendor-advisorypatch |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| IBM | Langflow OSS |
Affected:
1.0.0 , ≤ 1.10.0
(semver)
cpe:2.3:a:ibm:langflow:1.0.0:*:*:*:*:*:*:* cpe:2.3:a:ibm:langflow:1.10.0:*:*:*:*:*:*:* |
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CVE-2026-19853 (GCVE-0-2026-19853)
Vulnerability from cvelistv5 – Published: 2026-08-24 03:30 – Updated: 2026-08-24 12:51
VLAI
EPSS
VEX
Title
CyberTutor｜NewSiteServer (NSS) - Missing Authentication
Summary
NewSiteServer (NSS) developed by CyberTutor has a Missing Authentication vulnerability. Unauthenticated remote attackers can exploit a specific functionality to send emails to anyone on behalf of the school.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-24 12:32 UTC
CWE
- CWE-306 - Missing Authentication for Critical Function
Assigner
References
2 references
| URL | Tags |
|---|---|
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| https://www.twcert.org.tw/en/cp-139-11121-51e56-2.html | third-party-advisory |
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1 product
| Vendor | Product | Version | |
|---|---|---|---|
| CyberTutor | NewSiteServer (NSS) |
Affected:
all
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CVE-2026-19749 (GCVE-0-2026-19749)
Vulnerability from cvelistv5 – Published: 2026-08-13 20:45 – Updated: 2026-08-18 01:38
VLAI
EPSS
VEX
Title
Tenda CH7 RTSP/ONVIF missing authentication
Summary
A vulnerability was detected in Tenda CH7, CH7G, CH10, CP3, CP3 Pro, CP7, TC3B14C, TC3B15C, TC3T14C and TC3T15C up to 20260625. Affected by this vulnerability is an unknown functionality of the component RTSP/ONVIF. Performing a manipulation results in missing authentication. It is possible to initiate the attack remotely. The attack is considered to have high complexity. The exploitation appears to be difficult. The exploit is now public and may be used.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 01:37 UTC
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/389500 | vdb-entry |
| https://vuldb.com/vuln/389500/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-19749 | third-party-advisory |
| https://vuldb.com/submit/868503 | third-party-advisory |
| https://github.com/howitouchyou/Tenda-Smart-Camer… | related |
| https://www.tenda.com.cn/ | product |
Impacted products
10 products
| Vendor | Product | Version | |
|---|---|---|---|
| Tenda | CH7 |
Affected:
20260625
cpe:2.3:h:tenda:ch7:*:*:*:*:*:*:*:* |
|
| Tenda | CH7G |
Affected:
20260625
cpe:2.3:h:tenda:ch7g:*:*:*:*:*:*:*:* |
|
| Tenda | CH10 |
Affected:
20260625
cpe:2.3:h:tenda:ch10:*:*:*:*:*:*:*:* |
|
| Tenda | CP3 |
Affected:
20260625
cpe:2.3:h:tenda:cp3:*:*:*:*:*:*:*:* |
|
| Tenda | CP3 Pro |
Affected:
20260625
cpe:2.3:h:tenda:cp3_pro:*:*:*:*:*:*:*:* |
|
| Tenda | CP7 |
Affected:
20260625
cpe:2.3:h:tenda:cp7:*:*:*:*:*:*:*:* |
|
| Tenda | TC3B14C |
Affected:
20260625
cpe:2.3:h:tenda:tc3b14c:*:*:*:*:*:*:*:* |
|
| Tenda | TC3B15C |
Affected:
20260625
cpe:2.3:h:tenda:tc3b15c:*:*:*:*:*:*:*:* |
|
| Tenda | TC3T14C |
Affected:
20260625
cpe:2.3:h:tenda:tc3t14c:*:*:*:*:*:*:*:* |
|
| Tenda | TC3T15C |
Affected:
20260625
cpe:2.3:h:tenda:tc3t15c:*:*:*:*:*:*:*:* |
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CVE-2026-19441 (GCVE-0-2026-19441)
Vulnerability from cvelistv5 – Published: 2026-08-21 07:55 – Updated: 2026-08-27 13:37 Unsupported When Assigned
VLAI
EPSS
VEX
Title
Unauthenticated API Allows Analytics Data Manipulation in IKAS Technology's Rush
Summary
Missing authentication for critical function vulnerability in IKAS Technology Inc. Rush allows Fake the Source of Data.
This issue affects Rush: through 21082026.
NOTE: The vendor was contacted and it was learned that the product is not supported.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-21 12:38 UTC
CWE
- CWE-306 - Missing authentication for critical function
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://siberguvenlik.gov.tr/guvenlik-bildirimler… | government-resource |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| IKAS Technology Inc. | Rush |
Affected:
0 , ≤ 21082026
(custom)
|
Date Public
2026-08-21 07:46
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CVE-2026-19426 (GCVE-0-2026-19426)
Vulnerability from cvelistv5 – Published: 2026-08-12 07:07 – Updated: 2026-08-12 12:33
VLAI
EPSS
VEX
Title
FitSoft｜POS Sytstem - Missing Authentication
Summary
POS System developed by FitSoft has a Missing Authentication vulnerability. Unauthenticated remote attackers can directly access and operate the system.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-12 12:32 UTC
CWE
- CWE-306 - Missing Authentication for Critical Function
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://www.twcert.org.tw/tw/cp-132-11100-407c5-1.html | third-party-advisory |
| https://www.twcert.org.tw/en/cp-139-11101-4f85c-2.html | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| FitSoft | POS System |
Affected:
all
(custom)
|
Date Public
2026-08-12 06:58
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Mitigation
Architecture and Design
- Divide the software into anonymous, normal, privileged, and administrative areas. Identify which of these areas require a proven user identity, and use a centralized authentication capability.
- Identify all potential communication channels, or other means of interaction with the software, to ensure that all channels are appropriately protected, including those channels that are assumed to be accessible only by authorized parties. Developers sometimes perform authentication at the primary channel, but open up a secondary channel that is assumed to be private. For example, a login mechanism may be listening on one network port, but after successful authentication, it may open up a second port where it waits for the connection, but avoids authentication because it assumes that only the authenticated party will connect to the port.
- In general, if the software or protocol allows a single session or user state to persist across multiple connections or channels, authentication and appropriate credential management need to be used throughout.
Mitigation MIT-15
Architecture and Design
For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks entirely. Then, these modified values would be submitted to the server.
Mitigation
Architecture and Design
- Where possible, avoid implementing custom, "grow-your-own" authentication routines and consider using authentication capabilities as provided by the surrounding framework, operating system, or environment. These capabilities may avoid common weaknesses that are unique to authentication; support automatic auditing and tracking; and make it easier to provide a clear separation between authentication tasks and authorization tasks.
- In environments such as the World Wide Web, the line between authentication and authorization is sometimes blurred. If custom authentication routines are required instead of those provided by the server, then these routines must be applied to every single page, since these pages could be requested directly.
Mitigation MIT-4.5
Architecture and Design
Strategy: Libraries or Frameworks
- Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
- For example, consider using libraries with authentication capabilities such as OpenSSL or the ESAPI Authenticator [REF-45].
Mitigation
Implementation
System Configuration
Operation
When storing data in the cloud (e.g., S3 buckets, Azure blobs, Google Cloud Storage, etc.), use the provider's controls to require strong authentication for users who should be allowed to access the data [REF-1297] [REF-1298] [REF-1302].
CAPEC-12: Choosing Message Identifier
This pattern of attack is defined by the selection of messages distributed via multicast or public information channels that are intended for another client by determining the parameter value assigned to that client. This attack allows the adversary to gain access to potentially privileged information, and to possibly perpetrate other attacks through the distribution means by impersonation. If the channel/message being manipulated is an input rather than output mechanism for the system, (such as a command bus), this style of attack could be used to change the adversary's identifier to more a privileged one.
CAPEC-166: Force the System to Reset Values
An attacker forces the target into a previous state in order to leverage potential weaknesses in the target dependent upon a prior configuration or state-dependent factors. Even in cases where an attacker may not be able to directly control the configuration of the targeted application, they may be able to reset the configuration to a prior state since many applications implement reset functions.
CAPEC-216: Communication Channel Manipulation
An adversary manipulates a setting or parameter on communications channel in order to compromise its security. This can result in information exposure, insertion/removal of information from the communications stream, and/or potentially system compromise.
CAPEC-36: Using Unpublished Interfaces or Functionality
An adversary searches for and invokes interfaces or functionality that the target system designers did not intend to be publicly available. If interfaces fail to authenticate requests, the attacker may be able to invoke functionality they are not authorized for.
CAPEC-62: Cross Site Request Forgery
An attacker crafts malicious web links and distributes them (via web pages, email, etc.), typically in a targeted manner, hoping to induce users to click on the link and execute the malicious action against some third-party application. If successful, the action embedded in the malicious link will be processed and accepted by the targeted application with the users' privilege level. This type of attack leverages the persistence and implicit trust placed in user session cookies by many web applications today. In such an architecture, once the user authenticates to an application and a session cookie is created on the user's system, all following transactions for that session are authenticated using that cookie including potential actions initiated by an attacker and simply "riding" the existing session cookie.