What is CVE-2026-6631?

CVE-2026-6631 is a high-severity vulnerability in Tenda F451, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.8/10. Published 2026-04-20.

How severe is CVE-2026-6631?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in Tenda F451

CVE-2026-6631

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 b…

Vulnerability class: Buffer Overflow

EPSS: 0.000 (5.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R.

Affected products

Tenda F451 — versions 1.0.0.7_cn_svn7958

Weakness classification (CWE)

References

VDB-358265 | Tenda F451 httpd webExcptypemanFilter fromwebExcptypemanFilter buffer overflow (vdb-entry, technical-description)
VDB-358265 | CTI Indicators (IOB, IOC, IOA) (signature, permissions-required)
Submit #792904 | Tenda F451_kfw_V1.0.0.7_cn_svn7958 V1.0.0.7 Buffer Overflow (third-party-advisory)
github.com/Jimi-Lab/cve/issues/25 (exploit, issue-tracking)
www.tenda.com.cn/ (product)

Frequently asked questions

What is CVE-2026-6631?: CVE-2026-6631 is a high-severity vulnerability in Tenda F451, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.8/10. Published 2026-04-20.
How severe is CVE-2026-6631?: High severity. CVSS v3 base score is 8.8 out of 10.