CVE-2025-9087: tenda ac20_firmware

Vulnerability summary

CVE-2025-9087 is a critical (CVSS 9.8) vulnerability in tenda ac20_firmware. EPSS estimates a 1.19% chance of exploitation in the next 30 days, higher than 67.7% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 16-08-2025
   PublishedVulnerability first disclosed.
2. 18-08-2025
   Last modifiedVulnerability information updated.

Description

A vulnerability has been found in Tenda AC20 16.03.08.12. This affects the function set_qosMib_list of the file /goform/SetNetControlList of the component SetNetControlList Endpoint. The manipulation of the argument list leads to stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.

• CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferThe product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
• CWE-121Stack-based Buffer OverflowA stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).