CVE-2025-69700: tenda fh1203_firmware Stack-based Buffer Overflow

Vulnerability summary

CVE-2025-69700 is a high (CVSS 7.5) Stack-based Buffer Overflow vulnerability in tenda fh1203_firmware. EPSS estimates a 4.04% chance of exploitation in the next 30 days, higher than 90.5% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 23-02-2026
   PublishedVulnerability first disclosed.
2. 23-02-2026
   Last modifiedVulnerability information updated.

Description

Tenda FH1203 V2.0.1.6 contains a stack-based buffer overflow vulnerability in the modify_add_client_prio function, which is reachable via the formSetClientPrio CGI handler.

• 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).