CVE-2023-7220: totolink nr1800x_firmware Stack-based Buffer Overflow

Vulnerability summary

CVE-2023-7220 is a high (CVSS 10.0) Stack-based Buffer Overflow vulnerability in totolink nr1800x_firmware. EPSS estimates a 1.50% chance of exploitation in the next 30 days, higher than 74% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 09-01-2024
   PublishedVulnerability first disclosed.
2. 17-06-2025
   Last modifiedVulnerability information updated.

Description

A vulnerability was found in Totolink NR1800X 9.1.0u.6279_B20210910 and classified as critical. Affected by this issue is the function loginAuth of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument password leads to stack-based buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. VDB-249854 is the identifier 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).