CVE-2026-84393 Other in FortiOS
Improper certificate validation in FortiOS and FortiProxy allows attackers to disclose sensitive information.
- 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-2026-84393?
CVE-2026-84393 is a high-severity vulnerability in Fortinet FortiOS, published on 8 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A improper validation of certificate with host mismatch vulnerability in Fortinet FortiOS 7.6.1 through 7.6.6, FortiProxy 7.6.2 through 7.6.6 may allow attacker to information disclosure via <insert attack vector here>
Weakness: CWE-297
Which versions are affected by CVE-2026-84393?
How do I fix CVE-2026-84393?
No fix has been published for CVE-2026-84393 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-84393 being exploited?
There is no known exploitation of CVE-2026-84393 in the wild and no public exploit code.
Sources
Also known as GHSA-7mc8-g97x-qg4j.