Vulnerability · Published Sep 8, 2026 · Assigned by fortinet
CVE-2026-84393
High 7.3
In plain English
A high-severity security flaw in FortiOS from Fortinet. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities).
Severity (CVSS 3.1)7.3High
Exploit odds (30 days)0.3%top 79.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
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>
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Fortinet | FortiOS | 7.6.1 – through 7.6.6 |
| Fortinet | FortiProxy | 7.6.2 – through 7.6.6 |
Weakness: CWE-297 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C