Vulnerability · Published Dec 30, 2025 · Assigned by VulDB
CVE-2025-15255Tenda W6-S R7websSsecurityHandler httpd stack-based overflow
Critical 9.8
In plain English
A critical-severity stack buffer overflow in W6-S from Tenda. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 4.7% (higher than 92% of all known vulnerabilities).
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)4.7%top 8.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
A vulnerability was determined in Tenda W6-S 1.0.0.4(510). This impacts an unknown function of the file /bin/httpd of the component R7websSsecurityHandler. Executing a manipulation of the argument Cookie can lead to stack-based buffer overflow. The attack may be launched remotely. The exploit has been publicly disclosed and may be utilized.
Affected products (as reported)
Weakness: CWE-121, CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
References
- VDB-338645 | Tenda W6-S R7websSsecurityHandler httpd stack-based overflow vdb-entry, technical-description
- VDB-338645 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- Submit #725500 | Tenda W6-S V1.0.0.4(510) Stack-based Buffer Overflow third-party-advisory
- https://github.com/dwBruijn/CVEs/blob/main/Tenda/R7WebsSecurityHandler.md exploit
- https://www.tenda.com.cn/ product