CVE-2026-5978 Totolink A7100RU CGI cstecgi.cgi setWiFiAclRules os command injection
Remote attackers can execute arbitrary OS commands on Totolink A7100RU routers via the setWiFiAclRules 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-2026-5978?
CVE-2026-5978 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 security vulnerability has been detected in Totolink A7100RU 7.4cu.2313_b20191024. Affected is the function setWiFiAclRules of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument mode leads to os command injection. The attack can be initiated remotely. The exploit has been disclosed publicly and may be used.
Which versions are affected by CVE-2026-5978?
How do I fix CVE-2026-5978?
No fix has been published for CVE-2026-5978 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-2026-5978 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-5978 exists.
Sources
Also known as GHSA-gpqj-8899-c755.