High 7.4Known exploited (CISA KEV)Published Jan 13, 2026

CVE-2025-25249A 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,…

Updated under an hour ago (2026-10-19 04:00 UTC)

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It affects Fortinet FortiSwitchManager and 4 other products. Add what you run to find out whether that includes you.

CISA lists it as known exploited since Sep 9, 2026; federal agencies had to remediate by Sep 12, 2026. Treat that date as your deadline.

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Exploited in the last 30 days

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

CVSS: 7.4 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:W/RC:C
Weakness (CWE): CWE-122
Known exploited: Added to CISA KEV Sep 9, 2026; federal remediation due Sep 12, 2026Apply 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 (exploitation in the next 30 days): 3.80% (percentile 90)
Assigned by: fortinet
NVD analysis: Analyzed
Record last updated: Oct 15, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Fortinet FortiSwitchManager fortinet:fortiswitchmanager	from 7.2.2 through 7.2.5	CNA record
Fortinet FortiOS fortinet:fortios	from 7.6.0 through 7.6.2; from 7.4.0 through 7.4.7; from 7.2.4 through 7.2.11	CNA record
Siemens RUGGEDCOM APE1808 siemens:ruggedcom_ape1808 (from the name)	all versions	CISA ADP
fortinet fortios fortinet:fortios	from 6.4.0 before 7.0.18; from 7.2.0 before 7.2.12; from 7.4.0 before 7.4.9; from 7.6.0 before 7.6.4	NVD
fortinet fortiswitchmanager fortinet:fortiswitchmanager	from 7.0.0 before 7.0.6; from 7.2.0 before 7.2.7	NVD
fortinet fortisase fortinet:fortisase	25.1.39; 25.1.51	NVD
siemens ruggedcom_ape1808_firmware siemens:ruggedcom_ape1808_firmware	all versions	NVD

References

https://fortiguard.fortinet.com/psirt/FG-IR-25-084mitigation, vendor-advisory
https://cert-portal.siemens.com/productcert/html/ssa-864900.htmlthird-party-advisory
https://socradar.io/blog/cve-2025-25249-pivotc2-fortigate-rat/exploit, third-party-advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-25249us-government-resource

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.