CVE-2026-5850 Totolink A7100RU CGI cstecgi.cgi setVpnPassCfg os command injection
Remote attackers can execute arbitrary OS commands on Totolink A7100RU routers via the setVpnPassCfg CGI handler.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-5850?
CVE-2026-5850 is a critical command injection vulnerability in Totolink A7100RU, published on 9 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability was identified in Totolink A7100RU 7.4cu.2313_b20191024. This affects the function setVpnPassCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument pptpPassThru leads to os command injection. Remote exploitation of the attack is possible. The exploit is publicly available and might be used.
Which versions are affected by CVE-2026-5850?
How do I fix CVE-2026-5850?
No fix has been published for CVE-2026-5850 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-5850 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-5850 exists.
Sources
Also known as GHSA-2vw5-mf9h-8p68.