CVE-2025-6887: tenda ac5_firmware

Vulnerability summary

CVE-2025-6887 is a high (CVSS 9.0) vulnerability in tenda ac5_firmware. EPSS estimates a 0.99% chance of exploitation in the next 30 days, higher than 62.2% of scored vulnerabilities. 2 public exploits are recorded.

Timeline

1. 30-06-2025
   PublishedVulnerability first disclosed.
2. 30-06-2025
   Last modifiedVulnerability information updated.

Description

A vulnerability was found in Tenda AC5 15.03.06.47 and classified as critical. Affected by this issue is some unknown functionality of the file /goform/SetSysTimeCfg. The manipulation of the argument time/timeZone leads to stack-based buffer overflow. The attack may be launched 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).