CVE-2025-25253: Fortinet FortiOS: Improper Validation of Certificate with Host Mismatch vulnerability [CWE-297] in FortiProxy version 7.6.1 and below, version
This Fortinet advisory covers CVE-2025-25253 in FortiOS and FortiProxy.
- CVE-2025-25253
Key facts
- Vendor rating
- High, CVSS 7.5
- CISA KEV
- Not listed (catalogue checked )
- Affected
- FortiOS: 7.0.0 through 7.6.2 (vendor-listed versions); FortiProxy: 7.0.0 through 7.6.1 (vendor-listed versions)
- Fixed in
- FortiOS 7.6: 7.6.3, FortiOS 7.4: 7.4.9, FortiOS 7.2: migrate to a fixed release and 5 more below
- Source published
- Source revised
- Listed by VulniPulse
Compiled by VulniPulse from the linked sources. How records are collected and checked.
Affected products & platforms
Description
An Improper Validation of Certificate with Host Mismatch vulnerability [CWE-297] in FortiProxy version 7.6.1 and below, version 7.4.8 and below, 7.2 all versions, 7.0 all versions and FortiOS version 7.6.2 and below, version 7.4.8 and below, 7.2 all versions, 7.0 all versions ZTNA proxy may allow an unauthenticated attacker in a man-in-the middle position to intercept and tamper with connections to the ZTNA proxy
Text from the source record.
- FortiOS: 7.0.0 through 7.6.2 (vendor-listed versions)
- FortiProxy: 7.0.0 through 7.6.1 (vendor-listed versions)
Official advisory · high-confidence parse· fetched ·verify at source
How to fix CVE-2025-25253
Upgrade to a fixed release named by Fortinet:
- FortiOS 7.6: 7.6.3
- FortiOS 7.4: 7.4.9
- FortiOS 7.2: migrate to a fixed release
- FortiOS 7.0: migrate to a fixed release
- FortiProxy 7.6: 7.6.2
- FortiProxy 7.4: 7.4.9
- FortiProxy 7.2: migrate to a fixed release
- FortiProxy 7.0: migrate to a fixed release
Vendor guidance
- Upgrade per the Affected/Solution table: FortiOS 7.6: 7.6.3; FortiOS 7.4: 7.4.9; FortiOS 7.2: migrate to a fixed release; FortiOS 7.0: migrate to a fixed release; FortiProxy 7.6: 7.6.2; ….
Support dates for the fixed release lines
- Fortinet FortiOS 7.6: support ends
- Fortinet FortiOS 7.4: support ends
- Fortinet FortiOS 7.2: support ended
- Fortinet FortiOS 7.0: support ended
More Fortinet advisories
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