CVE-2025-9605: tenda ac21_firmware

Vulnerability summary

CVE-2025-9605 is a high (CVSS 10.0) vulnerability in tenda ac21_firmware. EPSS estimates a 5.57% chance of exploitation in the next 30 days, higher than 92.8% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 29-08-2025
   PublishedVulnerability first disclosed.
2. 29-08-2025
   Last modifiedVulnerability information updated.

Description

A security vulnerability has been detected in Tenda AC21 and AC23 16.03.08.16. Affected is the function GetParentControlInfo of the file /goform/GetParentControlInfo. Such manipulation of the argument mac leads to stack-based buffer overflow. The attack can be launched remotely. The exploit has been disclosed publicly 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).