CVE-2025-25249

criticalpriority · act · 90OT risk · criticalKEV · exploitedEPSS 0.037 · 90 %ileDEEUNLRUUS
grimoire priorityP0 · Act now
Exploitable?
Yes · in the wild
CISA KEV
Likely / severe?
3.74% (90th) EPSS
CVSS 9.8 · critical
Is it mine?
32 products
Check your exposure
Who says so?
7 sources
cnnvd · enisa_euvd · fstec_bdu · cert_bund

added 2026-09-09remediate by 2026-09-12

required action Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

EPSS · scored 2026-10-26

Fortinet Multiple Products Heap-based Buffer Overflow Vulnerability

A heap-based buffer overflow vulnerability in Fortinet FortiOS 7.6.0 through 7.6.3, FortiOS 7.4.0 through 7.4.8, FortiOS 7.2.0 through 7.2.11, FortiOS 7.0.0 through 7.0.17, FortiOS 6.4 all versions, FortiSwitchManager 7.2.0 through 7.2.6, FortiSwitchManager 7.0.0 through 7.0.5 allows attacker to execute unauthorized code or commands via specially crafted packets

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

  • FixedRUGGEDCOM APE1808siemens_psirt

    Update Fortigate NGFW to V7.4.9 or later following the secure update recommendation procedure. Contact customer support to receive detailed information

  • FixedRUGGEDCOM APE1808cisa_csaf_ot

    Update Fortigate NGFW to V7.4.9 or later following the secure update recommendation procedure. Contact customer support to receive detailed information

  • MitigationRUGGEDCOM APE1808siemens_psirt

    For each interface, remove "fabric" access (see https://fortiguard.fortinet.com/psirt/FG-IR-25-084)

  • MitigationRUGGEDCOM APE1808cisa_csaf_ot

    For each interface, remove "fabric" access (see https://fortiguard.fortinet.com/psirt/FG-IR-25-084)

02

cvss

Technical severity, 0–10. One row per scoring source.

9.8
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.4–9.8

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.9
v3.18.1highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · CISA US
v3.18.1highAV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU
v3.17.4highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:W/RC:Csecondary · ENISA EU
v3.18.1highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · psirt@fortinet.comexploitability 2.2 · impact 5.9
v3.18.1highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · Siemens ProductCERT DE
v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Hsecondary · CVSS-BT (t0sche)
v3.18.1highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:W/RC:Csecondary · NCSC-NL NL
03

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: active · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS
04

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-787USprimaryCWE-119USCWE-122USCWE-122USCWE-122USCWE-122US
05

affected products (32)

Products and version ranges known to be affected.

showing 20 of 32
06

advisories (4)

Vendor and ecosystem advisories describing this.

  • NCSC-2026-0015Kwetsbaarheid verholpen in Fortinet FortiOSNL2026-01-15csaf · ncsc_nlNL

    Fortinet heeft een kwetsbaarheid verholpen in FortiOS (Specifiek voor FortiSASE en FortiSwitchManager).

  • SSA-864900SSA-864900: Multiple Vulnerabilities in Fortigate NGFW before V7.6.6 on RUGGEDCOM APE1808 Devices2025-05-13csaf · siemens_psirtDE

    Fortinet has published information on vulnerabilities in FortiOS. This advisory lists the related Siemens Industrial products. Siemens has released a new version for RUGGEDCOM APE1808 and recommends to update to the latest version.

  • WID-SEC-W-2026-0085Fortinet FortiOS: Schwachstelle ermöglicht CodeausführungDeutsch2026-01-13csaf · cert_bundDE

    Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Fortinet FortiOS ausnutzen, um beliebigen Programmcode auszuführen.

  • ICSA-25-135-01Siemens RUGGEDCOM APE1808 Devices2025-05-13icsa · cisa_csaf_otUS

    Fortinet has published information on vulnerabilities in FortiOS. This advisory lists the related Siemens Industrial products. Siemens is preparing fix versions and recommends to consult and implement the workarounds provided in Fortinet's upstream security notifications.

07

also known as (5)

Other names and identifiers for this entity.

08

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bducert_bundcisa_csaf_otncsc_nlsiemens_psirtNVDCVE.orgMITRE
published 2026-01-13modified 2026-10-07
10

references (7)

External citations — patches, advisories, analysis.

scry

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