CVE-2025-7806: Tenda FH451 SafeClientFilter fromSafeClientFilter stack-based overflow

Vulnerability summary

CVE-2025-7806 is a high (CVSS 9.0) vulnerability in tenda fh451_firmware. EPSS estimates a 1.01% chance of exploitation in the next 30 days, higher than 62.8% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 18-07-2025
   PublishedVulnerability first disclosed.
2. 21-07-2025
   Last modifiedVulnerability information updated.

Description

A vulnerability classified as critical was found in Tenda FH451 1.0.0.9. This vulnerability affects the function fromSafeClientFilter of the file /goform/SafeClientFilter. The manipulation of the argument Go/page leads to stack-based buffer overflow. The attack can 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).