CVE-2023-7213: totolink n350rt_firmware Stack-based Buffer Overflow

Vulnerability summary

CVE-2023-7213 is a high (CVSS 8.8) Stack-based Buffer Overflow vulnerability in totolink n350rt_firmware. EPSS estimates a 0.90% chance of exploitation in the next 30 days, higher than 59.3% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 07-01-2024
   PublishedVulnerability first disclosed.
2. 17-06-2025
   Last modifiedVulnerability information updated.

Description

A vulnerability classified as critical was found in Totolink N350RT 9.3.5u.6139_B20201216. Affected by this vulnerability is the function main of the file /cgi-bin/cstecgi.cgi?action=login&flag=1 of the component HTTP POST Request Handler. The manipulation of the argument v33 leads to stack-based buffer overflow. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The identifier VDB-249769 was assigned to this vulnerability. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

• 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).
• CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.