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CVE-2025-25249

critical

Description

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

References

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

https://www.securityweek.com/fortinet-code-execution-flaw-exploited-in-pivotc2-rat-attacks/

https://thehackernews.com/2026/09/cisa-flags-exploited-cisco-citrix.html

https://securityaffairs.com/198850/security/u-s-cisa-adds-cisco-google-chromium-v8-fortinet-and-citrix-netscaler-flaws-to-its-known-exploited-vulnerabilities-catalog.html

https://www.cisa.gov/news-events/alerts/2026/09/09/cisa-adds-four-known-exploited-vulnerabilities-catalog

https://www.securityweek.com/fortinet-patches-critical-vulnerabilities-in-fortifone-fortisiem/

https://github.com/1337or420/FortiGate-FortiWeb-Multi-Exploit-Extractor

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-25249

https://fortiguard.fortinet.com/psirt/FG-IR-25-084

Details

Source: Mitre, NVD

Published: 2026-01-13

Updated: 2026-09-10

Known Exploited Vulnerability (KEV)

Risk Information

CVSS v2

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Severity: Critical

CVSS v3

Base Score: 9.8

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity: Critical

EPSS

EPSS: 0.00024

Vulnerability Watch

Tenable Research has classified this CVE under the following Vulnerability Watch classification, which includes active and historical (inactive) classifications. You can learn more about these classifications on our blog.

Vulnerability of Interest