Is CVE-2023-27997 actively exploited?

Yes. CVE-2023-27997 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2023-27997 be exploited remotely?

The attack vector of CVE-2023-27997 has not been classified yet.

What is the CVSS score of CVE-2023-27997?

CVE-2023-27997 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2023-27997

HIGHCISA KEVIN THE WILD

CVE-2023-27997

Published: June 13, 2023

EPSS:90.68%probability of exploitation in 30 daysPercentile:99.6th

Official 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.

NVD Source

CISA KEV Advisory

Fortinet FortiOS and FortiProxy SSL-VPN Heap-Based Buffer Overflow Vulnerability

Added to KEV: 2023-06-13Federal patch deadline: 2023-07-04⚠ USED IN RANSOMWARE CAMPAIGNS

Required Action (CISA)

Apply updates per vendor instructions.

Risk Analysis

This vulnerability in Fortinet FortiOS and FortiProxy SSL-VPN allows an unauthenticated, remote attacker to execute code or commands by sending specially crafted requests. Its high EPSS score of 0.90684 indicates a very high likelihood of exploitation, making it an urgent concern. The fact that it is in CISA's KEV catalog confirms it has been actively exploited.

This vulnerability is being actively exploited in the wild and is listed in CISA's KEV catalog, indicating confirmed real-world exploitation. It is remotely exploitable without authentication.

Recommended Action

Apply the latest security updates and patches for Fortinet FortiOS and FortiProxy SSL-VPN to address this heap-based buffer overflow vulnerability. Regularly review and update security configurations for SSL-VPN services.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2023-27997 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2023-27997 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.