No exploitation reportedFix available

CVE-2025-62439

No exploitation reported by the sources we read.

Published2026-02-10
WeaknessCWE-940

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

An Improper Verification of Source of a Communication Channel vulnerability [CWE-940] vulnerability in Fortinet FortiOS 7.6.0 through 7.6.4, FortiOS 7.4.0 through 7.4.9, FortiOS 7.2 all versions, FortiOS 7.0 all versions may allow an authenticated user with knowledge of FSSO policy configurations to gain unauthorized access to protected network resources via crafted requests.

Timeline

dates in UTC

2026-02-1016:16CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2025-62439?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2025-62439?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

ICSA-26-071-02 CISA1 known affected
Siemens RUGGEDCOM APE1808 Devices
RUGGEDCOM APE1808
SSA-975644 Siemens ProductCERT1 known affected
SSA-975644: Multiple Vulnerabilities in Fortigate NGFW on RUGGEDCOM APE1808 Devices
RUGGEDCOM APE1808

Full record on NVD

Fix

Vendor fix Siemens ProductCERT SSA-975644 · 1 productUpdate Fortigate NGFW to V7.4.10 or later version with FSSO TS Agent version 5.0 build 0324 or later version. Contact customer support to receive patch and update information
Vendor fix CISA ICSA-26-071-02 · 1 productUpdate Fortigate NGFW to V7.4.10 or later version with FSSO TS Agent version 5.0 build 0324 or later version. Contact customer support to receive patch and update information

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVE recordread 2026-10-23
CISA-ADPSSVC decisionnone2026-02-11
OpenCVESSVC decisionnone—
CNACVSS 3.14.2read 2026-10-23
CNAweakness (CWE)CWE-940read 2026-10-23
FIRST EPSSEPSS score0.2 %2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N
Published: 2026-02-10
Last Modified: 2026-06-17
NVD status: Deferred

Frequently asked questions

What is CVE-2025-62439?

Is CVE-2025-62439 actively exploited?

Active exploitation of CVE-2025-62439 has not been confirmed. Its EPSS score was 0.2% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2025-62439?

CVE-2025-62439 has a CVSS v3 base score of 4.2 (MEDIUM severity), with vector string CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N.

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