CVE-2026-84393: Fortinet FortiOS information disclosure
This Fortinet advisory covers CVE-2026-84393 in FortiOS and FortiProxy.
Key facts
- Vendor rating
- High, CVSS 8.1
- CISA KEV
- Not listed (catalogue checked )
- Affected
- FortiOS FortiOS: 7.2 through 8.0 (vendor-listed versions); FortiProxy FortiProxy: 7.2 through 8.0 (vendor-listed versions)
- Source published
- Source revised
- Listed by VulniPulse
Compiled by VulniPulse from the linked sources. How records are collected and checked.
Affected products & platforms
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
Text from the source record.
- FortiOS FortiOS: 7.2 through 8.0 (vendor-listed versions)
- FortiProxy FortiProxy: 7.2 through 8.0 (vendor-listed versions)
Official advisory · high-confidence parse· fetched ·verify at source
End-of-life dates for Fortinet FortiOS
CVE-2026-84393 in other vendors' advisories
- Fortinet: FG-IR-26-174, high severity
More Fortinet advisories
CVE-2026-106175Oct 13, 2026Double free in signal handlerCVE-2025-61624Apr 14, 2026Path Traversal in CLICVE-2026-24858Jan 27, 2026FortiOS: Authentication Bypass Using an Alternate Path or Channel vulnerability [CWE-288]CVE-2025-59718Dec 9, 2025improper verification of cryptographic signature vulnerability in Fortinet FortiOS 7.6.0CVE-2025-59719Dec 9, 2025FortiOS: improper verification of cryptographic signature vulnerability in FortinetCVE-2024-47569Oct 14, 2025insertion of sensitive information into sent data vulnerability in Fortinet FortiMail
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