CVE-2023-7221: totolink t6_firmware Classic Buffer Overflow

Vulnerability summary

CVE-2023-7221 is a high (CVSS 10.0) Classic Buffer Overflow vulnerability in totolink t6_firmware. EPSS estimates a 1.52% chance of exploitation in the next 30 days, higher than 74.3% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 09-01-2024
   PublishedVulnerability first disclosed.
2. 14-05-2025
   Last modifiedVulnerability information updated.

Description

A vulnerability was found in Totolink T6 4.1.9cu.5241_B20210923. It has been classified as critical. This affects the function main of the file /cgi-bin/cstecgi.cgi?action=login of the component HTTP POST Request Handler. The manipulation of the argument v41 leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The associated identifier of this vulnerability is VDB-249855. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

• 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.