CVE-2025-15255: Tenda w6-S Firmware

Critical severity, CVSS 9.8. EPSS: 4.7% chance of exploitation in the next 30 days.

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

• Tenda w6-S Firmware: version 1.0.0.4(510) only

Published 2025-12-30. Last modified 2026-06-17.