Buffer overflow in Totolink N600r
CVE-2025-11444
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 argume…
Vulnerability class: Buffer Overflow
EPSS: 0.004 (63.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). 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.
Affected products
- Totolink N600r — versions 4.3.0cu.7866_B20220506
Weakness classification (CWE)
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)
- github.com/z472421519/BinaryAudit/blob/main/PoC/BOF/TOTOLINK/wepkey/wepkey.md (exploit)
- github.com/z472421519/BinaryAudit/blob/main/PoC/BOF/TOTOLINK/wepkey/wepkey.md (exploit)
- www.totolink.net/ (product)
Frequently asked questions
- What is CVE-2025-11444?
- CVE-2025-11444 is a high-severity vulnerability in Totolink N600r, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.8/10. Published 2025-10-08.
- How severe is CVE-2025-11444?
- High severity. CVSS v3 base score is 8.8 out of 10.