CVE-2026-91853 TOTOLINK X5000R Export Ovpn cstecgi.cgi exportOvpn os command injection
Remote attackers can execute arbitrary OS commands via the exportOvpn handler in TOTOLINK X5000R routers, requiring authentication.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-91853?
CVE-2026-91853 is a medium-severity command injection vulnerability in TOTOLINK X5000R, published on 15 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability has been found in TOTOLINK X5000R 9.1.0cu.2089_B20211224. The impacted element is the function exportOvpn of the file /cgi-bin/cstecgi.cgi?action=exportOvpn&type=user of the component Export Ovpn Handler. The manipulation of the argument filetype leads to os command injection. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.
Which versions are affected by CVE-2026-91853?
How do I fix CVE-2026-91853?
No fix has been published for CVE-2026-91853 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-2026-91853 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-91853 exists.
Sources
Also known as GHSA-q4rv-4ppf-7295.