Vulnerability · Published Apr 13, 2026 · Assigned by VulDB
CVE-2026-6139Totolink A7100RU CGI cstecgi.cgi UploadOpenVpnCert 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 vulnerability has been found in Totolink A7100RU 7.4cu.2313_b20191024. This affects the function UploadOpenVpnCert of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Such manipulation of the argument FileName leads to os command injection. The attack can be launched remotely. The exploit has been disclosed to the 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-357003 | Totolink A7100RU CGI cstecgi.cgi UploadOpenVpnCert os command injection vdb-entry, technical-description
- VDB-357003 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
- Submit #792982 | Totolink A7100RU 7.4cu.2313_b20191024 Command Injection third-party-advisory
- https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_192/README.md exploit
- https://www.totolink.net/ product