CVE-2025-9046: tenda ac20_firmware

Vulnerability summary

CVE-2025-9046 is a high (CVSS 9.0) vulnerability in tenda ac20_firmware. EPSS estimates a 0.86% chance of exploitation in the next 30 days, higher than 58.1% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 15-08-2025
   PublishedVulnerability first disclosed.
2. 15-08-2025
   Last modifiedVulnerability information updated.

Description

A vulnerability was identified in Tenda AC20 16.03.08.12. This issue affects the function sub_46A2AC of the file /goform/setMacFilterCfg. The manipulation of the argument deviceList leads to stack-based buffer overflow. The attack may be initiated 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).