CVE-2023-27997Used in ransomware
Fortinet FortiOS and FortiProxy SSL-VPN
Fortinet FortiOS and FortiProxy SSL-VPN Heap-Based Buffer Overflow Vulnerability
What it is
Fortinet FortiOS and FortiProxy SSL-VPN contain a heap-based buffer overflow vulnerability which can allow an unauthenticated, remote attacker to execute code or commands via specifically crafted requests.
What to do
Apply updates per vendor instructions.
Vendor notices and references
Description and required action as published by CISA. Full record at NVD.
Other Fortinet entries on the list
- Multiple Products Fortinet Multiple Products Path Traversal Vulnerability CVE-2025-61624 · Oct 16, 2026
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- Multiple Products Fortinet Multiple Products Heap-based Buffer Overflow Vulnerability CVE-2025-25249 · Sep 9, 2026
- FortiOS Fortinet FortiOS Exposure of Sensitive Information to an Unauthorized Actor Vulnerability CVE-2025-68686 · Jul 27, 2026
- FortiSandbox Fortinet FortiSandbox OS Command Injection Vulnerability CVE-2026-39808 · Jul 16, 2026
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