Next cycleWhy this label: EPSS 3.7%, added 47 days ago

CVE-2025-25249Fortinet Multiple Products Heap-based Buffer Overflow Vulnerability

Product: Fortinet Multiple Products
Added to CISA KEV: September 9, 2026
Deadline for US federal agencies: September 12, 2026
Known ransomware use: Not known
EPSS, next 30 days: 3.7%, higher than 89% of scored CVEs (Oct 25, 2026)
Weakness: CWE-122, CWE-787

What CISA says

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.

What CISA asks you to do

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.

Sources

Also exploited recently

Data from CISA's Known Exploited Vulnerabilities catalog (public domain) and FIRST EPSS, refreshed hourly. Rheono did not find or test this vulnerability; this page summarizes public sources.