CVE-2026-9455 Totolink A8000RU Web Management cstecgi.cgi UploadOpenVpnCert os command injection
Remote attackers can execute arbitrary OS commands via the FileName argument in the UploadOpenVpnCert function of the Totolink A8000RU web interface.
- 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-2026-9455?
CVE-2026-9455 is a critical command injection vulnerability in Totolink A8000RU, published on 25 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability has been found in Totolink A8000RU 7.1cu.643_b20200521. This issue affects the function UploadOpenVpnCert of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. The manipulation of the argument FileName leads to os command injection. Remote exploitation of the attack is possible. The exploit has been disclosed to the public and may be used.
Which versions are affected by CVE-2026-9455?
How do I fix CVE-2026-9455?
No fix has been published for CVE-2026-9455 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-2026-9455 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-9455 exists.
Sources
Also known as GHSA-4crh-78xh-vwrj.