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Critical · 9.2 Known exploited · Ransomware Public exploit CVE-2023-27997 EUVD-2023-31722GHSA-2hj2-fcr9-9p35

A heap-based buffer overflow vulnerability [CWE-122] in FortiOS version 7.2.4 and below, version 7.0.11 and below, version 6.4.12 and below…

Published Jun 13, 2023 · Updated Jul 31, 2026 · Assigned by fortinet

Vendor: Fortinet Product: FortiOS Product: FortiOS-6K7K Product: FortiProxy Category: Network devices

Description

A heap-based buffer overflow vulnerability [CWE-122] in FortiOS version 7.2.4 and below, version 7.0.11 and below, version 6.4.12 and below, version 6.0.16 and below and FortiProxy version 7.2.3 and below, version 7.0.9 and below, version 2.0.12 and below, version 1.2 all versions, version 1.1 all versions SSL-VPN may allow a remote attacker to execute arbitrary code or commands via specifically crafted requests.

Affected products

VendorProductAffectedFixed
Fortinet FortiOS-6K7K 7.0.10, 7.0.5, 6.4.12, 6.4.10, 6.4.8, 6.4.6, 6.4.2, 6.2.9 – ≤ 6.2.13, 6.2.6 – ≤ 6.2.7, 6.2.4, 6.0.12 – ≤ 6.0.16, 6.0.10 —
Fortinet FortiProxy 7.2.0 – ≤ 7.2.3, 7.0.0 – ≤ 7.0.9, 2.0.0 – ≤ 2.0.12, 1.2.0 – ≤ 1.2.13, 1.1.0 – ≤ 1.1.6 —
Fortinet FortiOS 7.2.0 – ≤ 7.2.4, 7.0.0 – ≤ 7.0.11, 6.4.0 – ≤ 6.4.12, 6.2.0 – ≤ 6.2.13, 6.0.0 – ≤ 6.0.16 —

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 12 repositories · most starred shown

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Advisories 3

References