Buffer overflow in Tenda W6-S
CVE-2025-15255
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.047 (91.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 91.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.046 · newest: 0.047 · change: +0.001
Affected products
- Tenda W6-S — versions 1.0.0.4(510)
- Tenda W6-S Firmware — versions 1.0.0.4\(510\), 1.0.0.4(510)
Weakness classification (CWE)
References
- vuldb.com/ (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/ (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/ (VDB Entry, Third Party Advisory, third-party-advisory)
- github.com/dwBruijn/CVEs/blob/main/Tenda/R7WebsSecurityHandler.md (Exploit, Third Party Advisory, exploit)
- www.tenda.com.cn/ (Product, product)
Frequently asked questions
- What is CVE-2025-15255?
- CVE-2025-15255 is a critical-severity vulnerability in Tenda W6-S, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2025-12-30.
- How severe is CVE-2025-15255?
- Critical severity. CVSS v3 base score is 9.8 out of 10.