Common Weakness Enumeration
CWE-670
Allowed-with-ReviewAlways-Incorrect Control Flow Implementation
Abstraction: Class · Status: Draft
The code contains a control flow path that does not reflect the algorithm that the path is intended to implement, leading to incorrect behavior any time this path is navigated.
224 vulnerabilities reference this CWE, most recent first.
CVE-2026-20713 (GCVE-0-2026-20713)
Vulnerability from cvelistv5 – Published: 2026-08-11 16:25 – Updated: 2026-08-12 15:51
VLAI
EPSS
VEX
Summary
Always-incorrect control flow implementation in some firmware for some Intel(R) Xeon(R) processors may allow an escalation of privilege. System software adversary with a privileged user combined with a high complexity attack may enable escalation of privilege. This result may potentially occur via local access when attack requirements are not present without special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (none), integrity (none) and availability (none) of the vulnerable system, resulting in subsequent system confidentiality (high), integrity (high) and availability (none) impacts.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-12 15:51 UTC
CWE
- Escalation of Privilege
- CWE-670 - Always-Incorrect Control Flow Implementation
Assigner
References
1 reference
Impacted products
1 product
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CVE-2026-20171 (GCVE-0-2026-20171)
Vulnerability from cvelistv5 – Published: 2026-05-20 16:06 – Updated: 2026-05-20 18:31
VLAI
EPSS
VEX
Title
Cisco Nexus 3000 and 9000 Series Border Gateway Protocol Denial of Service Vulnerability
Summary
A vulnerability in the Border Gateway Protocol (BGP) enforce-first-as feature of Cisco Nexus 3000 Series Switches and Cisco Nexus 9000 Series Switches in standalone NX-OS mode could allow an unauthenticated, remote attacker to trigger BGP peer flaps, resulting in a denial of service (DoS) condition.
This vulnerability is due to incorrect parsing of a transitive BGP attribute. An attacker could exploit this vulnerability by sending a crafted BGP update through an established BGP peer session. If the update propagates to an affected device, it could cause the device to drop the BGP session and flap with the BGP peer that is forwarding this update, resulting in a DoS condition.
Severity
6.8 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-20 18:31 UTC
CWE
- CWE-670 - Always-Incorrect Control Flow Implementation
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Cisco | Cisco NX-OS Software |
Affected:
10.2(1)
Affected: 10.2(1q) Affected: 10.2(2) Affected: 10.2(3) Affected: 10.2(3t) Affected: 10.2(2a) Affected: 10.3(1) Affected: 10.2(4) Affected: 10.3(2) Affected: 10.3(3) Affected: 10.2(5) Affected: 10.2(3v) Affected: 10.4(1) Affected: 10.3(99w) Affected: 10.2(6) Affected: 10.3(3w) Affected: 10.3(99x) Affected: 10.3(3o) Affected: 10.3(4) Affected: 10.3(3p) Affected: 10.3(4a) Affected: 10.4(2) Affected: 10.3(3q) Affected: 10.3(5) Affected: 10.2(7) Affected: 10.4(3) Affected: 10.3(3x) Affected: 10.3(4g) Affected: 10.5(1) Affected: 10.2(8) Affected: 10.3(3r) Affected: 10.3(6) Affected: 10.4(4) Affected: 10.3(4h) Affected: 10.5(2) Affected: 10.3(7) Affected: 10.4(5) Affected: 10.5(3) Affected: 10.2(9) Affected: 10.4(4g) Affected: 10.6(1) Affected: 10.5(3t) Affected: 10.3(8) Affected: 10.4(6) Affected: 10.5(3s) Affected: 10.5(3e) Affected: 10.5(3o) Affected: 10.6(1s) Affected: 10.5(3p) |
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CVE-2026-19487 (GCVE-0-2026-19487)
Vulnerability from cvelistv5 – Published: 2026-08-13 15:51 – Updated: 2026-08-13 20:12
VLAI
EPSS
VEX
Title
Perl versions from 5.9.4 before 5.41.9 produce incorrect regular expression match results when a stale failure flag ends the Aho-Corasick prescan early in S_find_byclass
Summary
Perl versions from 5.9.4 before 5.41.9 produce incorrect regular expression match results when a stale failure flag ends the Aho-Corasick prescan early in S_find_byclass.
The prescan walks the subject for positions where the full pattern could match, and the engine tries it from the leftmost one recorded. A failing transition sets the failed flag, and a later successful transition does not clear it, so the prescan reads the stale flag as a failure and stops before it can record a candidate that starts earlier. It takes a subject where one candidate is recorded and a later character then forces a fallback through a fail link that succeeds.
Example:
"ABCDE" =~ m/ABCF|BCDE|C/; # matches C at offset 2, not BCDE
"ABCDE" =~ m/ABCF|BCDE|C(G)/; # no match, BCDE missed
An alternation like this can miss input it should match, or match it on the wrong branch, so an access or filtering decision made from the result can be wrong.
Severity
5.3 (Medium)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 17:47 UTC
CWE
- CWE-670 - Always-Incorrect Control Flow Implementation
Assigner
References
3 references
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CVE-2026-14935 (GCVE-0-2026-14935)
Vulnerability from cvelistv5 – Published: 2026-07-07 15:37 – Updated: 2026-09-10 17:27
VLAI
EPSS
VEX
Title
Gstreamer1-plugins-bad-free: gstreamer: webrtcbin accepts remote sdp without a=fingerprint due to inverted presence check
Summary
A logic vulnerability was found in GStreamer's webrtcbin component. The _check_sdp_crypto() function contains an inverted boolean condition that causes it to accept remote SDP offers or answers that lack the required a=fingerprint attribute, while incorrectly rejecting those that include it. An attacker with the ability to intercept and modify WebRTC signaling messages could exploit this to bypass the SDP-level DTLS certificate fingerprint binding, weakening defenses against man-in-the-middle attacks on media streams.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-07 16:13 UTC
CWE
- CWE-670 - Always-Incorrect Control Flow Implementation
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-14935 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2497679 | issue-trackingx_refsource_REDHAT |
| https://gitlab.freedesktop.org/gstreamer/gstreame… | |
| https://gitlab.freedesktop.org/gstreamer/gstreame… |
Impacted products
5 products
| Vendor | Product | Version | |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 |
cpe:/o:redhat:enterprise_linux:10
|
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
|
| Red Hat | Red Hat Enterprise Linux 8 |
cpe:/o:redhat:enterprise_linux:8
|
|
| Red Hat | Red Hat Enterprise Linux 9 |
cpe:/o:redhat:enterprise_linux:9
|
Date Public
2026-07-07 15:25
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CVE-2026-7656 (GCVE-0-2026-7656)
Vulnerability from cvelistv5 – Published: 2026-06-29 22:09 – Updated: 2026-08-06 20:20
VLAI
EPSS
VEX
Title
Broken IPv6 Neighbor Discovery input validation allows spoofed RA/NS/NA acceptance in Zephyr net stack
Summary
The IPv6 Neighbor Discovery handlers in subsys/net/ip/ipv6_nbr.c (handle_ra_input, handle_ns_input, handle_na_input) used an incorrect boolean expression that combined the RFC 4861 validity checks with the ICMPv6 code check using the wrong operator precedence: the form was ((length/hop/source/target checks) && (icmp_hdr->code != 0)). Because every legitimate ND message carries ICMPv6 code 0, an attacker setting code == 0 (the normal value) caused the entire predicate to evaluate false, so the packet was never dropped and all of the other checks were silently skipped. The bypassed checks include the mandatory Hop Limit == 255 verification (which proves an ND packet originated on-link and was not forwarded) and, for Router Advertisements, the requirement that the source be a link-local address, as well as multicast-target sanity checks. As a result, an adjacent on-link attacker — and, because the Hop-Limit-255 guard is bypassed, potentially a remote/off-link attacker whose packets would otherwise be rejected — can have forged Router Advertisement, Neighbor Solicitation, and Neighbor Advertisement messages accepted. A forged RA lets the attacker reconfigure the victim's default router, on-link prefixes (SLAAC), MTU, reachable/retransmit timers, and (with CONFIG_NET_IPV6_RA_RDNSS) DNS servers, while forged NS/NA enable neighbor-cache poisoning, enabling man-in-the-middle, traffic redirection, and denial of service. The flaw is an input-validation/authentication weakness rather than a memory-safety issue: the underlying packet-parsing primitives (net_pkt_get_data, net_pkt_read, net_pkt_skip) are independently bounds-safe and the validated length is the true buffer length, so skipping the length check causes no out-of-bounds access. The defect has existed since the logic was introduced in 2018 and shipped in all releases through v4.4.0; it is fixed by splitting the condition so any failing check drops the packet.
Severity
8.1 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-30 13:10 UTC
Assigner
References
2 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| zephyrproject | zephyr |
Affected:
1.14.0 , < 4.5.0
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CVE-2026-6608 (GCVE-0-2026-6608)
Vulnerability from cvelistv5 – Published: 2026-04-20 05:15 – Updated: 2026-04-20 14:57
VLAI
EPSS
VEX
Title
lm-sys fastchat Arena Side-by-Side View add_text control flow
Summary
A vulnerability was detected in lm-sys fastchat up to 0.2.36. Impacted is the function add_text of the component Arena Side-by-Side View Handler. The manipulation results in incorrect control flow. The attack can be launched remotely. The exploit is now public and may be used. The root cause was fixed in commit 34eca62 for gradio_block_arena_named.py, but three other files were missed.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-20 14:57 UTC
CWE
- CWE-670 - Incorrect Control Flow
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/358243 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/358243/cti | signaturepermissions-required |
| https://vuldb.com/submit/792228 | third-party-advisory |
| https://github.com/lm-sys/FastChat/issues/3834 | issue-tracking |
| https://gist.github.com/YLChen-007/e45039d23e6982… | exploit |
| https://github.com/lm-sys/FastChat/ | product |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| lm-sys | fastchat |
Affected:
0.2.0
Affected: 0.2.1 Affected: 0.2.2 Affected: 0.2.3 Affected: 0.2.4 Affected: 0.2.5 Affected: 0.2.6 Affected: 0.2.7 Affected: 0.2.8 Affected: 0.2.9 Affected: 0.2.10 Affected: 0.2.11 Affected: 0.2.12 Affected: 0.2.13 Affected: 0.2.14 Affected: 0.2.15 Affected: 0.2.16 Affected: 0.2.17 Affected: 0.2.18 Affected: 0.2.19 Affected: 0.2.20 Affected: 0.2.21 Affected: 0.2.22 Affected: 0.2.23 Affected: 0.2.24 Affected: 0.2.25 Affected: 0.2.26 Affected: 0.2.27 Affected: 0.2.28 Affected: 0.2.29 Affected: 0.2.30 Affected: 0.2.31 Affected: 0.2.32 Affected: 0.2.33 Affected: 0.2.34 Affected: 0.2.35 Affected: 0.2.36 cpe:2.3:a:lm-sys:fastchat:*:*:*:*:*:*:*:* |
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CVE-2026-1874 (GCVE-0-2026-1874)
Vulnerability from cvelistv5 – Published: 2026-03-03 06:46 – Updated: 2026-04-24 07:24
VLAI
EPSS
VEX
Title
Denial-of-Service (DoS) vulnerability in Ethernet function of MELSEC iQ-F Series EtherNet/IP module and Ethernet module
Summary
Always-Incorrect Control Flow Implementation vulnerability in Mitsubishi Electric Corporation MELSEC iQ-F Series FX5-ENET/IP Ethernet Module FX5-ENET/IP versions 1.106 and prior and Mitsubishi Electric Corporation MELSEC iQ-F Series FX5-EIP EtherNet/IP Module FX5-EIP versions 1.000 and prior allows a remote attacker to cause a denial-of-service (DoS) condition on the products by continuously sending UDP packets to the products. A system reset of the product is required for recovery.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-03 14:35 UTC
CWE
- CWE-670 - Always-Incorrect Control Flow Implementation
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://www.mitsubishielectric.com/psirt/vulnerab… | vendor-advisory |
| https://jvn.jp/vu/JVNVU93286687/ | government-resource |
| https://www.cisa.gov/news-events/ics-advisories/i… | government-resource |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mitsubishi Electric Corporation | MELSEC iQ-F Series FX5-ENET/IP Ethernet Module FX5-ENET/IP |
Affected:
versions 1.106 and prior
|
|
| Mitsubishi Electric Corporation | MELSEC iQ-F Series FX5-EIP EtherNet/IP Module FX5-EIP |
Affected:
versions 1.000 and prior
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CVE-2025-58136 (GCVE-0-2025-58136)
Vulnerability from cvelistv5 – Published: 2026-04-02 15:54 – Updated: 2026-04-02 18:13
VLAI
EPSS
VEX
Title
Apache Traffic Server: A simple legitimate POST request causes a crash
Summary
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Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-02 18:12 UTC
CWE
- CWE-670 - Always-Incorrect Control Flow Implementation
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/2s11roxlv1j8ph6q5… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache Traffic Server |
Affected:
10.0.0 , ≤ 10.1.1
(semver)
Affected: 9.0.0 , ≤ 9.2.12 (semver) |
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CVE-2025-49091 (GCVE-0-2025-49091)
Vulnerability from cvelistv5 – Published: 2025-06-11 00:00 – Updated: 2025-06-18 00:12
VLAI
EPSS
VEX
Summary
KDE Konsole before 25.04.2 allows remote code execution in a certain scenario. It supports loading URLs from the scheme handlers such as a ssh:// or telnet:// or rlogin:// URL. This can be executed regardless of whether the ssh, telnet, or rlogin binary is available. In this mode, there is a code path where if that binary is not available, Konsole falls back to using /bin/bash for the given arguments (i.e., the URL) provided. This allows an attacker to execute arbitrary code.
Severity
8.2 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-06-11 13:39 UTC
CWE
- CWE-670 - Always-Incorrect Control Flow Implementation
Assigner
References
7 references
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CVE-2025-33199 (GCVE-0-2025-33199)
Vulnerability from cvelistv5 – Published: 2025-11-25 18:00 – Updated: 2025-11-25 21:23
VLAI
EPSS
VEX
Summary
NVIDIA DGX Spark GB10 contains a vulnerability in SROOT firmware, where an attacker could cause incorrect control flow behavior. A successful exploit of this vulnerability might lead to data tampering.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-11-25 21:22 UTC
CWE
- CWE-670 - Always-Incorrect Control Flow Implementation
Assigner
References
Impacted products
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No mitigation information available for this CWE.
No CAPEC attack patterns related to this CWE.