CVE-2025-15255 Tenda W6-S R7websSsecurityHandler httpd stack-based overflow
Remote attackers can trigger a stack-based buffer overflow in the Tenda W6-S router's httpd service via the Cookie header, potentially leading to code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-15255?
CVE-2025-15255 is a critical memory corruption vulnerability in Tenda W6-S, published on 30 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Which versions are affected by CVE-2025-15255?
It affects 1 product.
Products include Tenda W6-S Firmware.
How do I fix CVE-2025-15255?
No fix has been published for CVE-2025-15255 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-15255 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-15255 exists.
Other vulnerabilities in Tenda W6-S
Sources
Also known as GHSA-pw2q-c8xj-w9fw.