Vulnerability · Published Apr 6, 2026 · Assigned by VulDB
CVE-2026-5688Totolink A7100RU cstecgi.cgi setDdnsCfg os command injection
High 7.3
In plain English
A high-severity OS command injection in A7100RU from Totolink. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.6% (higher than 76% of all known vulnerabilities).
Severity (CVSS 3.1)7.3High
Exploit odds (30 days)1.6%top 24.4% 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 A7100RU 7.4cu.2313_b20191024. Impacted is the function setDdnsCfg of the file /cgi-bin/cstecgi.cgi. Such manipulation of the argument provider leads to os command injection. The attack may be launched remotely. The exploit has been disclosed publicly and may be used.
Affected products (as reported)
Weakness: CWE-78, CWE-77 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
References
- VDB-355515 | Totolink A7100RU cstecgi.cgi setDdnsCfg os command injection vdb-entry, technical-description
- VDB-355515 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
- Submit #792945 | Totolink A7100RU 7.4cu.2313_b20191024 Command Injection third-party-advisory
- https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_186/README.md exploit
- https://www.totolink.net/ product