Vulnerability · Published May 4, 2026 · Assigned by VulDB
CVE-2026-7749Totolink N300RH POST Request cstecgi.cgi setWanConfig buffer overflow
High 8.8
In plain English
A high-severity buffer overflow in N300RH from Totolink. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 47% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.6%top 53.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
A security vulnerability has been detected in Totolink N300RH 3.2.4-B20220812. This affects the function setWanConfig of the file /cgi-bin/cstecgi.cgi of the component POST Request Handler. The manipulation of the argument priDns leads to buffer overflow. The attack may be initiated remotely. The exploit has been disclosed publicly and may be used.
Affected products (as reported)
Weakness: CWE-120, CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
References
- VDB-360924 | Totolink N300RH POST Request cstecgi.cgi setWanConfig buffer overflow vdb-entry, technical-description
- VDB-360924 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- Submit #807203 | Totolink N300RH N300RH V3_Firmware V3.2.4-B20220812 Buffer Overflow third-party-advisory
- https://lavender-bicycle-a5a.notion.site/TOTOLINK-N300RH-setWanConfig-34553a41781f80ed8500d9b8d54074f2 exploit
- https://www.totolink.net/ product