CVE-2026-7747: totolink n300rh_firmware

Vulnerability summary

CVE-2026-7747 is a high (CVSS 10.0) vulnerability in totolink n300rh_firmware. EPSS estimates a 1.02% chance of exploitation in the next 30 days, higher than 63% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 04-05-2026
   PublishedVulnerability first disclosed.
2. 04-05-2026
   Last modifiedVulnerability information updated.

Description

A security flaw has been discovered in Totolink N300RH 3.2.4-B20220812. Affected by this vulnerability is the function loginauth of the file /cgi-bin/cstecgi.cgi of the component Parameter Handler. Performing a manipulation of the argument Password results in buffer overflow. The attack can be initiated remotely. The exploit has been released to the public and may be used for attacks.

• CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferThe product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
• 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.