Vulnerability · Published Apr 9, 2026 · Assigned by VulDB

CVE-2026-5975Totolink A7100RU CGI cstecgi.cgi setDmzCfg os command injection

Critical 9.8

In plain English

A critical-severity OS command injection in A7100RU from Totolink. There are no confirmed reports of exploitation so far. 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 21.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

A vulnerability was identified in Totolink A7100RU 7.4cu.2313_b20191024. The impacted element is the function setDmzCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Such manipulation of the argument wanIdx leads to os command injection. The attack may be performed from remote. The exploit is publicly available and might 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-356529 | Totolink A7100RU CGI cstecgi.cgi setDmzCfg os command injection vdb-entry, technical-description
VDB-356529 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
Submit #791821 | Totolink A7100RU 7.4cu.2313_b20191024 Command Injection third-party-advisory
https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_161/README.md exploit
https://www.totolink.net/ product