CVE-2026-5689 Totolink A7100RU cstecgi.cgi setNtpCfg os command injection
Remote attackers can execute arbitrary OS commands on Totolink A7100RU routers via the setNtpCfg function in cstecgi.cgi.
- 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-2026-5689?
CVE-2026-5689 is a medium-severity command injection vulnerability in Totolink A7100RU, published on 6 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability was detected in Totolink A7100RU 7.4cu.2313_b20191024. The affected element is the function setNtpCfg of the file /cgi-bin/cstecgi.cgi. Performing a manipulation of the argument tz results in os command injection. Remote exploitation of the attack is possible. The exploit is now public and may be used.
Which versions are affected by CVE-2026-5689?
How do I fix CVE-2026-5689?
No fix has been published for CVE-2026-5689 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-2026-5689 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-5689 exists.
Sources
Also known as GHSA-jqvm-5g74-g525.