CVE-2023-27997
Fortinet FortiOS and FortiProxy SSL-VPN Heap-Based Buffer Overflow Vulnerability
IN CISA KEV
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.
- Vendor
- Fortinet
- Product
- FortiOS and FortiProxy SSL-VPN
- CVSS
- No score recorded (no NVD record loaded for this entry)
- CWE
- CWE-122
- Published
- Not recorded
- NVD modified
- Not recorded
CISA KEV
- Date added
- 2023-06-13
- Due date
- 2023-07-04
- Ransomware use
- Known
- Required action
- Apply updates per vendor instructions.
EPSS
85.7% chance of exploitation in the next 30 days (percentile 99th)
FIRST EPSS, updated 17 Oct 2026. About EPSS
CVSS is severity, EPSS is likelihood, KEV means already exploited. EPSS is a statistical probability, not a certainty: a low score does not make a bug safe, and a high one does not prove it is being exploited.
Data last updated 18 Oct 2026. Sources: NVD API 2.0, CISA KEV catalog, FIRST EPSS. Links: NVD, CISA KEV. Metadata only. ThreatWire does not host exploit code.