Vulnerability · Published Apr 6, 2026 · Assigned by VulDB
CVE-2026-5691Totolink A7100RU cstecgi.cgi setFirewallType 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 1.3% (higher than 71% of all known vulnerabilities).
Severity (CVSS 3.1)7.3High
Exploit odds (30 days)1.3%top 29.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
A vulnerability has been found in Totolink A7100RU 7.4cu.2313_b20191024. This affects the function setFirewallType of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument firewallType leads to os command injection. The attack is possible to be carried out remotely. The exploit has been disclosed to the public 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-355518 | Totolink A7100RU cstecgi.cgi setFirewallType os command injection vdb-entry, technical-description
- VDB-355518 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
- Submit #792962 | Totolink A7100RU 7.4cu.2313_b20191024 Command Injection third-party-advisory
- https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_189/README.md exploit
- https://www.totolink.net/ product