CVE-2023-27997

CISA KEV RANSOMWARE
ACT NOW Priority: 0.00 BB Relevance: 10/100
Published: N/A Modified: N/A First seen: 2026-10-29 Status: pending_score

Description

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.

CISA Known Exploited Vulnerability

Vendor / Product Fortinet — FortiOS and FortiProxy SSL-VPN
Date Added 2023-06-13
Remediation Due 2023-07-04
Ransomware Use CONFIRMED
https://www.fortiguard.com/psirt/FG-IR-23-097; https://nvd.nist.gov/vuln/detail/CVE-2023-27997

Weakness Classification (2)

Affected Software (23)

VendorProductVersion
fortinet fortios 6.0.0 – 6.0.16
fortinet fortios 6.2.0 – 6.2.13
fortinet fortios 6.4.0 – 6.4.12
fortinet fortios 7.0.0 – 7.0.11
fortinet fortios 7.2.0 – 7.2.4
fortinet fortios 6.0.12 – 6.0.16
fortinet fortios 6.2.9 – 6.2.13
fortinet fortios 6.0.10
fortinet fortios 6.2.4
fortinet fortios 6.2.6
fortinet fortios 6.2.7
fortinet fortios 6.4.2
fortinet fortios 6.4.6
fortinet fortios 6.4.8
fortinet fortios 6.4.10
fortinet fortios 6.4.12
fortinet fortios 7.0.5
fortinet fortios 7.0.10
fortinet fortiproxy 1.1.0 – 1.1.6
fortinet fortiproxy 1.2.0 – 1.2.13
fortinet fortiproxy 2.0.0 – 2.0.12
fortinet fortiproxy 7.0.0 – 7.0.9
fortinet fortiproxy 7.2.0 – 7.2.3

Bug Bounty Relevance

10 / 100
✓ Known exploited (KEV)
✓ High exploitation probability

CVSS Score

Unscored

EPSS — Exploitation Probability

85.69%
Raw Score 0.856890
Percentile 99.7%
Date 2026-10-28

Intelligence Sources

kev ref →