Vulnerability · Published Oct 8, 2025 · Assigned by VulDB

CVE-2025-11444TOTOLINK N600R HTTP Request cstecgi.cgi setWiFiBasicConfig buffer overflow

High 8.8

In plain English

A high-severity buffer overflow in N600R from TOTOLINK. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.1% (higher than 65% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)1.1%top 35.2% 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 N600R up to 4.3.0cu.7866_B20220506. This impacts the function setWiFiBasicConfig of the file /cgi-bin/cstecgi.cgi of the component HTTP Request Handler. Such manipulation of the argument wepkey leads to buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed publicly and may be used.

Affected products (as reported)

Vendor	Product	Versions
TOTOLINK	N600R	4.3.0cu.7866_B20220506

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-327381 | TOTOLINK N600R HTTP Request cstecgi.cgi setWiFiBasicConfig buffer overflow vdb-entry, technical-description
VDB-327381 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
Submit #666915 | TOTOLINK N600R firmware V4.3.0cu.7866_B20220506 Buffer Overflow third-party-advisory
https://github.com/z472421519/BinaryAudit/blob/main/PoC/BOF/TOTOLINK/wepkey/wepkey.md exploit
https://github.com/z472421519/BinaryAudit/blob/main/PoC/BOF/TOTOLINK/wepkey/wepkey.md#reproduce exploit
https://www.totolink.net/ product