Home › Exploited CVEs › CVE-2023-27997
CVE-2023-27997: Fortinet FortiOS and FortiProxy SSL-VPN Heap-Based Buffer Overflow Vulnerability
Fortinet FortiOS and FortiProxy SSL-VPN · in CISA KEV since 2023-06-13
2023-06-13added to KEV
2023-07-04federal remediation due date
85.69%EPSS exploit probability (30 days) 99.7th percentile
9.8 CRITICALCVSS 3.1
Knownknown ransomware use
0days from NVD publication to KEV
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.
Required action (CISA)
Apply updates per vendor instructions.
| CWE | CWE-122 |
|---|---|
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD published | 2023-06-13 (Analyzed) |
Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2023-27997.json · all KEV CVEs
Kevscope: daily CISA KEV + EPSS datasetThe whole KEV catalog joined with daily EPSS and CVSS scores as CSV/Parquet, refreshed daily. Free to download.
Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.
Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.