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High 7.3Published Sep 8, 2026
CVE-2026-84393A 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…
Updated under an hour ago ()
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It affects Fortinet FortiOS and 2 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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>
- CVSS
- 7.3 HIGH (v3.1, CNA)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
- Weakness (CWE)
- CWE-297
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- fortinet
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Fortinet FortiOS fortinet:fortios | from 7.6.1 through 7.6.6 | CNA record |
Fortinet FortiProxy fortinet:fortiproxy | from 7.6.2 through 7.6.6 | CNA record |
Siemens RUGGEDCOM APE1808 siemens:ruggedcom_ape1808 (from the name) | all versions | CISA ADP |
References
- https://fortiguard.fortinet.com/psirt/FG-IR-26-174
- https://cert-portal.siemens.com/productcert/html/ssa-127084.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.