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CRITICAL

CVE-2023-27997

Published: March 18, 2026 · Source: National Vulnerability Database (NVD)

⚡ AI Threat Assessment

FortiOS SSL VPN heap overflow enabling unauthenticated RCE — Volt Typhoon (Chinese APT) actively exploited before patch release. Apply patches immediately or disable SSL VPN. Review all FortiOS VPN gateway logs for unauthorized access attempts.

📋 Official Description

A heap-based buffer overflow vulnerability in FortiOS and FortiProxy SSL VPN PSIRT before versions 7.4.1, 7.2.5, 7.0.12, 6.4.13, 6.0.17 may allow a remote unauthenticated attacker to execute arbitrary code.

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