CISA-confirmed known exploited vulnerability

CVE-2022-42475

Fortinet FortiOS Heap-Based Buffer Overflow Vulnerability

Fortinet · FortiOS

Vulnerability details

Multiple versions of Fortinet FortiOS SSL-VPN contain a heap-based buffer overflow vulnerability which can allow an unauthenticated, remote attacker to execute arbitrary code or commands via specifically crafted requests.

Added to CISA KEV: 2022-12-13

Ransomware campaign use: Known

CISA due date: 2023-01-03

Defensive guidance from CISA

Apply updates per vendor instructions.

This is the source's required-action field, not an independently validated patch procedure. Refer to the vendor for exact affected versions and fixes.

Source catalog date: 2026-11-06T19:44:45.1797Z · Last retrieved: 2026-11-06 21:02:26 UTC

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