Vulnerability · Published Mar 29, 2026 · Assigned by VulDB
CVE-2026-5101Totolink A3300R Parameter cstecgi.cgi setLanCfg command injection
Medium 6.3
In plain English
A medium-severity command injection in A3300R from Totolink. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 2.4% (higher than 84% of all known vulnerabilities).
Severity (CVSS 3.1)6.3Medium
Exploit odds (30 days)2.4%top 15.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
A vulnerability was identified in Totolink A3300R 17.0.0cu.557_b20221024. This affects the function setLanCfg of the file /cgi-bin/cstecgi.cgi of the component Parameter Handler. The manipulation of the argument lanIp leads to command injection. Remote exploitation of the attack is possible. The exploit is publicly available and might be used.
Affected products (as reported)
Weakness: CWE-77, CWE-74 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
References
- VDB-354126 | Totolink A3300R Parameter cstecgi.cgi setLanCfg command injection vdb-entry, technical-description
- VDB-354126 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
- Submit #779128 | Totolink A3300R 17.0.0cu.557_b20221024 Command Injection third-party-advisory
- https://github.com/Litengzheng/vul_db/blob/main/A3300R/vul_39/README.md exploit
- https://www.totolink.net/ product