Is CVE-2025-25253 being actively exploited?

CVE-2025-25253 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2025-25253?

CVE-2025-25253 has a CVSS 3.1 base score of 7.5 (HIGH).

CVE-2025-25253

HIGH · CVSS 7.5EPSS 0.1%EU EUVD

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

Key facts

CVSS score: 7.5 (v3.1)
Severity: HIGH
CVSS vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-297
EPSS score: 0.1% (1th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2025-34241)
Published: October 14, 2025
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2025-34241 in the EU Vulnerability Database. Last updated in EUVD on October 15, 2026.

View on the EU Vulnerability Database

Affected products

fortinet / fortios
fortinet / fortiproxy

Certified products that may be affected

1 FIPS 140 or Common Criteria certified product, from automated matching by sec-certs.org.

Fortinet, Inc. FortiOS 7.0.7 - Fortinet, Inc. - Common Criteria NSCIB-CC-0590233-CR - active

References

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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