CVE-2025-25253

HIGH

7.5

CVSS Score

Published: October 14, 2025 at 03:22 PM UTC

Updated: October 18, 2026 at 09:10 PM UTC

4 products affected across 2 vendorsFortiOSFortiProxyFortiPAM

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Severity

HIGH7.5

Exploit prediction

EPSS 0.1%

SSVC

No known exploit

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

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

FortiOS · Fortinet

95%

All versions7.0.0 ≤ v < 7.4.97.6.0 ≤ v < 7.6.37.0.0 7.0.1 7.0.10 7.0.11 7.0.12 7.0.13 7.0.14 7.0.15 7.0.16 7.0.17 7.0.18 7.0.2 7.0.3 7.0.4 7.0.5 7.0.6 7.0.7 7.0.8 7.0.9 7.2.0 7.2.1 7.2.10 7.2.11 7.2.12 7.2.2 7.2.3 7.2.4 7.2.5 7.2.6 7.2.7 7.2.8 7.2.9 7.4.0 7.4.1 7.4.2 7.4.3 7.4.4 7.4.5 7.4.6 7.4.7 7.4.8 7.6.0 7.6.1 7.6.2

Affected range stops below 7.4.9, so it looks safe — our inference, not a vendor statement

Affected range stops below 7.6.3, so it looks safe — our inference, not a vendor statement

FortiProxy · Fortinet

95%

All versions7.0.0 ≤ v < 7.4.97.6.0 ≤ v < 7.6.27.0.0 7.0.1 7.0.10 7.0.11 7.0.12 7.0.13 7.0.14 7.0.15 7.0.16 7.0.17 7.0.18 7.0.19 7.0.2 7.0.20 7.0.21 7.0.22 7.0.3 7.0.4 7.0.5 7.0.6 7.0.7 7.0.8 7.0.9 7.2.0 7.2.1 7.2.10 7.2.11 7.2.12 7.2.13 7.2.14 7.2.15 7.2.2 7.2.3 7.2.4 7.2.5 7.2.6 7.2.7 7.2.8 7.2.9 7.4.0 7.4.1 7.4.2 7.4.3 7.4.4 7.4.5 7.4.6 7.4.7 7.4.8 7.6.0 7.6.1

Affected range stops below 7.4.9, so it looks safe — our inference, not a vendor statement

Affected range stops below 7.6.2, so it looks safe — our inference, not a vendor statement

FortiPAM · Fortinet

90%

1.4.1

RUGGEDCOM APE1808 Firmware · Siemens

60%

All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://fortiguard.fortinet.com/psirt/FG-IR-24-457

References (2)

Vendor Advisory

Source: cverecord

https://fortiguard.fortinet.com/psirt/FG-IR-24-457

Source: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e

https://cert-portal.siemens.com/productcert/html/ssa-864900.html

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGH[email protected]

Attack Vector: ADJACENT_NETWORK
Complexity: HIGH
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-297

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