Vulnerability · Published Apr 13, 2026 · Assigned by VulDB

CVE-2026-6156Totolink A7100RU CGI cstecgi.cgi setIpQosRules os command injection

Critical 9.8

In plain English

A critical-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 1.8% (higher than 79% of all known vulnerabilities).

Severity (CVSS 3.1)9.8Critical

Exploit odds (30 days)1.8%top 21.1% 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. This affects the function setIpQosRules of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument Comment leads to os command injection. Remote exploitation of the attack is possible. The exploit has been disclosed publicly and may be used.

Affected products (as reported)

Vendor	Product	Versions
Totolink	A7100RU	7.4cu.2313_b20191024

Weakness: CWE-78, CWE-77 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

References

VDB-357036 | Totolink A7100RU CGI cstecgi.cgi setIpQosRules os command injection vdb-entry, technical-description
VDB-357036 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
Submit #793681 | Totolink A7100RU 7.4cu.2313_b20191024 Command Injection third-party-advisory
https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_197/README.md exploit
https://www.totolink.net/ product