CVE-2025-67189: totolink a950rg_firmware Classic Buffer Overflow

Vulnerability summary

CVE-2025-67189 is a medium (CVSS 6.5) Classic Buffer Overflow vulnerability in totolink a950rg_firmware. EPSS estimates a 0.46% chance of exploitation in the next 30 days, higher than 38.5% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 03-02-2026
   PublishedVulnerability first disclosed.
2. 09-02-2026
   Last modifiedVulnerability information updated.

Description

A buffer overflow vulnerability exists in the setParentalRules interface of TOTOLINK A950RG V4.1.2cu.5204_B20210112. The urlKeyword parameter is not properly validated, and the function concatenates multiple user-controlled fields into a fixed-size stack buffer without performing boundary checks. A remote attacker can exploit this flaw to cause denial of service or potentially achieve arbitrary code execution.

• CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.