Vulnerability · Published Jan 19, 2026 · Assigned by VulDB
CVE-2026-1156Totolink LR350 cstecgi.cgi setWiFiBasicCfg buffer overflow
High 8.8
In plain English
A high-severity buffer overflow in LR350 from Totolink. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 55% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.7%top 45.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
A vulnerability was determined in Totolink LR350 9.3.5u.6369_B20220309. Affected by this issue is the function setWiFiBasicCfg of the file /cgi-bin/cstecgi.cgi. This manipulation of the argument ssid causes buffer overflow. It is possible to initiate the attack remotely. The exploit has been publicly disclosed and may be utilized.
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-341750 | Totolink LR350 cstecgi.cgi setWiFiBasicCfg buffer overflow vdb-entry, technical-description
- VDB-341750 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- Submit #735722 | TOTOLINK LR350 LR350 V9.3.5u.6369_B20220309 Buffer Overflow third-party-advisory
- https://lavender-bicycle-a5a.notion.site/TOTOLINK-LR350-setWiFiBasicCfg-2e453a41781f80a2ad43e85bf5d46659?source=copy_link exploit
- https://www.totolink.net/ product