Vulnerability · Published Apr 27, 2026 · Assigned by VulDB
CVE-2026-7138Totolink A8000RU CGI cstecgi.cgi setNtpCfg 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 vulnerability was detected in Totolink A8000RU 7.1cu.643_b20200521. This vulnerability affects the function setNtpCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument tz results in os command injection. The attack can be executed remotely. The exploit is now 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:H/I:H/A:H/E:P/RL:X/RC:R
References
- VDB-359737 | Totolink A8000RU CGI cstecgi.cgi setNtpCfg os command injection vdb-entry, technical-description
- VDB-359737 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
- Submit #801105 | Totolink A8000RU 7.1cu.643_b20200521 Command Injection third-party-advisory
- https://github.com/Litengzheng/vuldb_new2/blob/main/A8000RU/vul_313/README.md exploit
- https://www.totolink.net/ product