Vulnerability · Published May 1, 2026 · Assigned by VulDB
CVE-2026-7538Totolink A8000RU CGI cstecgi.cgi vulnerability 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 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 vulnerability was identified in Totolink A8000RU 7.1cu.643_b20200521. This issue affects the function Vulnerability of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument proto leads to os command injection. The attack may be initiated remotely. The exploit is publicly available and might 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:H/I:H/A:H/E:P/RL:X/RC:R
References
- VDB-360354 | Totolink A8000RU CGI cstecgi.cgi vulnerability os command injection vdb-entry, technical-description
- VDB-360354 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
- Submit #804321 | Totolink A8000RU 7.1cu.643_b20200521 Command Injection third-party-advisory
- https://github.com/Litengzheng/vuldb_new2/blob/main/A8000RU/vul_329/README.md exploit
- https://www.totolink.net/ product