CVE-2025-67187: totolink a950rg_firmware Stack-based Buffer Overflow

Vulnerability summary

CVE-2025-67187 is a critical (CVSS 9.8) Stack-based Buffer Overflow vulnerability in totolink a950rg_firmware. EPSS estimates a 0.51% chance of exploitation in the next 30 days, higher than 42.3% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 03-02-2026
   PublishedVulnerability first disclosed.
2. 04-02-2026
   Last modifiedVulnerability information updated.

Description

A stack-based buffer overflow vulnerability was identified in TOTOLINK A950RG V4.1.2cu.5204_B20210112. The flaw exists in the setIpQosRules interface of /lib/cste_modules/firewall.so where the comment parameter is not properly validated for length.

• 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).