CVE-2025-25249

HIGHCVSS 8.1Known Exploited

CISA Known Exploited Vulnerability

https://fortiguard.fortinet.com/psirt/FG-IR-25-084 ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2025-25249

Remediation deadline: September 12, 2026

Description

Fortinet FortiOS, FortiSwitchManager, and FortiSASE contain a heap-based buffer overflow vulnerability that allows an attacker to execute unauthorized code or commands via specially crafted packets.

Timeline

Published:January 13th, 2026 5:15 PM

Last modified:October 7th, 2026 6:17 PM

Added to KEV:September 9th, 2026

CVSS Scoring

CVSS v3: 8.1 (HIGH)

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

Affected Software

From NVD CPE configuration data

Vendors

fortinetsiemens

Products

fortiosfortiswitchmanagerfortisaseruggedcom_ape1808_firmware

Weaknesses (CWE)

CWE-122 CWE-787

References & Reports

Advisories, patches, and third-party reports

Source: NIST NVD · Data may lag official sources by up to one minute