Vulnerability · Published Apr 27, 2026 · Assigned by VulDB

CVE-2026-7136Totolink A8000RU CGI cstecgi.cgi setDmzCfg os command injection

Critical 9.8

In plain English

A critical-severity OS command injection in A8000RU 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 78% of all known vulnerabilities).

Severity (CVSS 3.1)9.8Critical

Exploit odds (30 days)1.8%top 21.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A weakness has been identified in Totolink A8000RU 7.1cu.643_b20200521. Affected by this issue is the function setDmzCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Executing a manipulation of the argument wanIdx can lead to os command injection. The attack may be launched remotely. The exploit has been made available to the public and could be used for attacks.

Affected products (as reported)

Vendor	Product	Versions
Totolink	A8000RU	7.1cu.643_b20200521

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-359735 | Totolink A8000RU CGI cstecgi.cgi setDmzCfg os command injection vdb-entry, technical-description
VDB-359735 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
Submit #801007 | Totolink A8000RU 7.1cu.643_b20200521 Command Injection third-party-advisory
https://github.com/Litengzheng/vuldb_new2/blob/main/A8000RU/vul_311/README.md exploit
https://www.totolink.net/ product