CVE-2026-6631
Published: 20 April 2026
Summary
CVE-2026-6631 is a high-severity Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119) vulnerability in Com (inferred from references). Its CVSS base score is 7.4 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 41.4th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-16 (Memory Protection).
Deeper analysis
CVE-2026-6631 is a buffer overflow vulnerability in Tenda F451 firmware version 1.0.0.7_cn_svn7958. The flaw affects the fromwebExcptypemanFilter function in the /goform/webExcptypemanFilter file of the httpd component, triggered by manipulation of the page argument.
The vulnerability enables remote exploitation by attackers with low privileges, such as authenticated users, with low attack complexity and no requirement for user interaction. Successful exploitation can result in high confidentiality, integrity, and availability impacts, as reflected in its CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H). The associated CWEs are CWE-119 and CWE-120.
Advisories and further details are available via VulDB entries (https://vuldb.com/vuln/358265, https://vuldb.com/submit/792904, https://vuldb.com/vuln/358265/cti) and a GitHub issue (https://github.com/Jimi-Lab/cve/issues/25), along with the vendor site (https://www.tenda.com.cn/). An exploit has been publicly disclosed and may be utilized.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-23828
Vulnerability details
A vulnerability was determined in Tenda F451 1.0.0.7_cn_svn7958. Impacted is the function fromwebExcptypemanFilter of the file /goform/webExcptypemanFilter of the component httpd. Executing a manipulation of the argument page can lead to buffer overflow. The attack may be launched remotely. The…
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exploit has been publicly disclosed and may be utilized.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Buffer overflow in public-facing httpd web interface (/goform/webExcptypemanFilter) directly enables remote exploitation of a public-facing application (T1190) by low-privileged authenticated users; high confidentiality/integrity/availability impact from low privileges indicates exploitation for privilege escalation (T1068).
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly remediates the buffer overflow flaw in the httpd component's fromwebExcptypemanFilter function through timely firmware patching.
Enforces validation of the manipulated 'page' argument at the /goform/webExcptypemanFilter input point to prevent buffer overflow.
Provides memory protections like address space layout randomization or data execution prevention to block exploitation of the buffer overflow vulnerability.