CVE-2026-5676 Totolink A8000R cstecgi.cgi setLanguageCfg missing authentication
Remote attackers can modify language settings on Totolink A8000R routers without authentication due to missing checks in the setLanguageCfg function.
- 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-2026-5676?
CVE-2026-5676 is a medium-severity missing authorization vulnerability in Totolink A8000R, 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 identified in Totolink A8000R 5.9c.681_B20180413. This issue affects the function setLanguageCfg of the file /cgi-bin/cstecgi.cgi. Such manipulation of the argument langType leads to missing authentication. The attack can be launched remotely. The exploit is publicly available and might be used.
Which versions are affected by CVE-2026-5676?
How do I fix CVE-2026-5676?
No fix has been published for CVE-2026-5676 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-5676 being exploited?
There is no known exploitation of CVE-2026-5676 in the wild and no public exploit code.
Sources
Also known as GHSA-q9rv-xq5x-5rp6.