Vulnerability · Published May 4, 2026 · Assigned by VulDB
CVE-2026-7750Totolink N300RH POST Request cstecgi.cgi setMacFilterRules 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 0.5% (higher than 40% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.5%top 59.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
A vulnerability was detected in Totolink N300RH 3.2.4-B20220812. This vulnerability affects the function setMacFilterRules of the file /cgi-bin/cstecgi.cgi of the component POST Request Handler. The manipulation of the argument mac_address results in buffer overflow. The attack may be launched remotely. The exploit is now public 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-360925 | Totolink N300RH POST Request cstecgi.cgi setMacFilterRules buffer overflow vdb-entry, technical-description
- VDB-360925 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- Submit #807204 | Totolink N300RH N300RH V3_Firmware V3.2.4-B20220812 Buffer Overflow third-party-advisory
- https://lavender-bicycle-a5a.notion.site/TOTOLINK-N300RH-setMacFilterRules-34553a41781f809cb952cdcb71ce90d8 exploit
- https://www.totolink.net/ product