Common Weakness Enumeration
CWE-121
AllowedStack-based Buffer Overflow
Abstraction: Variant · Status: Draft
A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
5831 vulnerabilities reference this CWE, most recent first.
CVE-2021-27246 (GCVE-0-2021-27246)
Vulnerability from cvelistv5 – Published: 2021-04-14 15:45 – Updated: 2024-08-03 20:48
VLAI
EPSS
VEX
Summary
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of TP-Link Archer A7 AC1750 1.0.15 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of MAC addresses by the tdpServer endpoint. A crafted TCP message can write stack pointers to the stack. An attacker can leverage this vulnerability to execute code in the context of the root user. Was ZDI-CAN-12306.
Severity
CWE
- CWE-121 - Stack-based Buffer Overflow
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.zerodayinitiative.com/advisories/ZDI-… | x_refsource_MISC |
Impacted products
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CVE-2021-27239 (GCVE-0-2021-27239)
Vulnerability from cvelistv5 – Published: 2021-03-29 21:05 – Updated: 2024-08-03 20:48
VLAI
EPSS
VEX
Summary
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R6400 and R6700 firmware version 1.0.4.98 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the upnpd service, which listens on UDP port 1900 by default. A crafted MX header field in an SSDP message can trigger an overflow of a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-11851.
Severity
8.8 (High)
CWE
- CWE-121 - Stack-based Buffer Overflow
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://www.zerodayinitiative.com/advisories/ZDI-… | x_refsource_MISC |
| https://kb.netgear.com/000062820/Security-Advisor… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| NETGEAR | Multiple Routers |
Affected:
firmware version 1.0.4.98
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CVE-2021-27137 (GCVE-0-2021-27137)
Vulnerability from cvelistv5 – Published: 2026-07-16 00:00 – Updated: 2026-07-22 03:55
VLAI
EPSS
VEX
Summary
An issue was discovered in router/upnp/src/ssdp.c in DD-WRT before 45724. An unsafe strcpy in the UPnP handling functionality allows an unauthenticated remote attacker to send a request that would overflow an internal fixed buffer. Exploitation requires the DD-WRT user to enable UPnP (which is off by default, and only listens on internal interfaces by default). This occurs in ssdp_msearch (reachable by an M-SEARCH request).
Severity
8.1 (High)
SSVC
Exploitation: active
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-21 00:00 UTC
CWE
- CWE-121 - Stack-based Buffer Overflow
Assigner
References
6 references
Impacted products
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CVE-2021-26731 (GCVE-0-2021-26731)
Vulnerability from cvelistv5 – Published: 2022-10-24 00:00 – Updated: 2025-05-07 15:42
VLAI
EPSS
VEX
Title
spx_restservice modifyUserb_func Command Injection and Multiple Stack-Based Buffer Overflows
Summary
Command injection and multiple stack-based buffer overflows vulnerabilities in the modifyUserb_func function of spx_restservice allow an authenticated attacker to execute arbitrary code with the same privileges as the server user (root). This issue affects: Lanner Inc IAC-AST2500A standard firmware version 1.10.0.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-05-07 15:40 UTC
CWE
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Lanner Inc | IAC-AST2500A |
Affected:
1.10.0
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CVE-2021-26730 (GCVE-0-2021-26730)
Vulnerability from cvelistv5 – Published: 2022-10-24 00:00 – Updated: 2025-05-07 15:40
VLAI
EPSS
VEX
Title
spx_restservice Login_handler_func Subfunction Stack-Based Buffer Overflow
Summary
A stack-based buffer overflow vulnerability in a subfunction of the Login_handler_func function of spx_restservice allows an attacker to execute arbitrary code with the same privileges as the server user (root). This issue affects: Lanner Inc IAC-AST2500A standard firmware version 1.10.0.
Severity
10 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-05-07 15:38 UTC
CWE
- CWE-121 - Stack-based Buffer Overflow
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Lanner Inc | IAC-AST2500A |
Affected:
1.10.0
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CVE-2021-26729 (GCVE-0-2021-26729)
Vulnerability from cvelistv5 – Published: 2022-10-24 00:00 – Updated: 2025-05-07 15:36
VLAI
EPSS
VEX
Title
spx_restservice Login_handler_func Command Injection and Multiple Stack-Based Buffer Overflows
Summary
Command injection and multiple stack-based buffer overflows vulnerabilities in the Login_handler_func function of spx_restservice allow an attacker to execute arbitrary code with the same privileges as the server user (root). This issue affects: Lanner Inc IAC-AST2500A standard firmware version 1.10.0.
Severity
10 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-05-07 15:35 UTC
CWE
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Lanner Inc | IAC-AST2500A |
Affected:
1.10.0
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CVE-2021-26728 (GCVE-0-2021-26728)
Vulnerability from cvelistv5 – Published: 2022-10-24 00:00 – Updated: 2024-08-03 20:33
VLAI
EPSS
VEX
Title
spx_restservice KillDupUsr_func Command Injection and Stack-Based Buffer Overflow
Summary
Command injection and stack-based buffer overflow vulnerabilities in the KillDupUsr_func function of spx_restservice allow an attacker to execute arbitrary code with the same privileges as the server user (root). This issue affects: Lanner Inc IAC-AST2500A standard firmware version 1.10.0.
Severity
10 (Critical)
CWE
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Lanner Inc | IAC-AST2500A |
Affected:
1.10.0
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CVE-2021-26727 (GCVE-0-2021-26727)
Vulnerability from cvelistv5 – Published: 2022-10-24 00:00 – Updated: 2025-05-07 14:59
VLAI
EPSS
VEX
Title
spx_restservice SubNet_handler_func Multiple Command Injections and Stack-Based Buffer Overflows
Summary
Multiple command injections and stack-based buffer overflows vulnerabilities in the SubNet_handler_func function of spx_restservice allow an attacker to execute arbitrary code with the same privileges as the server user (root). This issue affects: Lanner Inc IAC-AST2500A standard firmware version 1.10.0.
Severity
10 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-05-07 14:59 UTC
CWE
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Lanner Inc | IAC-AST2500A |
Affected:
1.10.0
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CVE-2021-26635 (GCVE-0-2021-26635)
Vulnerability from cvelistv5 – Published: 2022-06-01 15:04 – Updated: 2024-08-03 20:26
VLAI
EPSS
VEX
Title
Bandisoft ARK Library buffer overflow vulnerability
Summary
In the code that verifies the file size in the ark library, it is possible to manipulate the offset read from the target file due to the wrong use of the data type. An attacker could use this vulnerability to cause a stack buffer overflow and as a result, perform an attack such as remote code execution.
Severity
7.8 (High)
CWE
- CWE-121 - Stack-based Buffer Overflow
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.krcert.or.kr/krcert/secNoticeView.do?… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Bandisoft International Inc. | ark library |
Affected:
unspecified , ≤ 7.17
(custom)
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CVE-2021-26567 (GCVE-0-2021-26567)
Vulnerability from cvelistv5 – Published: 2021-02-26 21:45 – Updated: 2024-09-16 19:56
VLAI
EPSS
VEX
Summary
Stack-based buffer overflow vulnerability in frontend/main.c in faad2 before 2.2.7.1 allow local attackers to execute arbitrary code via filename and pathname options.
Severity
No CVSS data available.
CWE
- CWE-121 - Stack-based Buffer Overflow
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://www.synology.com/security/advisory/Synolo… | x_refsource_CONFIRM |
| https://github.com/knik0/faad2/commit/720f7004d6c… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| github/knik0 | faad2 |
Affected:
unspecified , < 2.2.7.1
(custom)
|
Date Public
2021-02-26 00:00
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Mitigation MIT-10
Operation
Build and Compilation
Strategy: Environment Hardening
- Use automatic buffer overflow detection mechanisms that are offered by certain compilers or compiler extensions. Examples include: the Microsoft Visual Studio /GS flag, Fedora/Red Hat FORTIFY_SOURCE GCC flag, StackGuard, and ProPolice, which provide various mechanisms including canary-based detection and range/index checking.
- D3-SFCV (Stack Frame Canary Validation) from D3FEND [REF-1334] discusses canary-based detection in detail.
Mitigation
Architecture and Design
Use an abstraction library to abstract away risky APIs. Not a complete solution.
Mitigation
Implementation
Implement and perform bounds checking on input.
Mitigation
Implementation
Do not use dangerous functions such as gets. Use safer, equivalent functions which check for boundary errors.
Mitigation MIT-11
Operation
Build and Compilation
Strategy: Environment Hardening
- Run or compile the software using features or extensions that randomly arrange the positions of a program's executable and libraries in memory. Because this makes the addresses unpredictable, it can prevent an attacker from reliably jumping to exploitable code.
- Examples include Address Space Layout Randomization (ASLR) [REF-58] [REF-60] and Position-Independent Executables (PIE) [REF-64]. Imported modules may be similarly realigned if their default memory addresses conflict with other modules, in a process known as "rebasing" (for Windows) and "prelinking" (for Linux) [REF-1332] using randomly generated addresses. ASLR for libraries cannot be used in conjunction with prelink since it would require relocating the libraries at run-time, defeating the whole purpose of prelinking.
- For more information on these techniques see D3-SAOR (Segment Address Offset Randomization) from D3FEND [REF-1335].
No CAPEC attack patterns related to this CWE.