Fortinet FortiOS and FortiProxy known exploited vulnerabilities
We track 6 CVEs in Fortinet FortiOS and FortiProxy. All of them are on CISA's Known Exploited Vulnerabilities catalog, meaning CISA has evidence of exploitation in the wild (listed 2022–2025). CISA flags 6 of them as used in ransomware campaigns. The most recent is CVE-2025-24472, added to KEV on .
Also listed as: FortiOS / FortiProxy · FortiOS and FortiProxy SSL-VPN. CISA, NVD and vendor advisories name the same product differently; each CVE page keeps the wording from its source.
- CVEs tracked
- 6
- On CISA KEV
- 6
- Ransomware use
- 6
- Rated critical
- 4
Every Fortinet FortiOS and FortiProxy CVE we track
| CVE / Vulnerability | Severity | CVSS | EPSS | Added to KEV | Patch by |
|---|---|---|---|---|---|
| CVE-2025-24472 Fortinet FortiOS and FortiProxy Authentication Bypass Vulnerabilityransomware use | [ HIGH ] | 8.1 | 7.2% | ||
| CVE-2024-55591 Fortinet FortiOS and FortiProxy Authentication Bypass Vulnerabilityransomware use | [ CRITICAL ] | 9.8 | 94.3% | ||
| CVE-2023-27997 Fortinet FortiOS and FortiProxy SSL-VPN Heap-Based Buffer Overflow Vulnerabilityransomware use | [ CRITICAL ] | 9.8 | 85.7% | ||
| CVE-2022-40684 FortiOS / FortiProxy Authentication Bypass on Administrative Interfaceransomware usewrite-up | [ CRITICAL ] | — | 100.0% | ||
| CVE-2018-13383 Fortinet FortiOS and FortiProxy Out-of-bounds Writeransomware use | [ MEDIUM ] | 4.3 | 33.6% | ||
| CVE-2018-13382 Fortinet FortiOS and FortiProxy Improper Authorizationransomware use | [ CRITICAL ] | 9.1 | 81.7% |
Sorted by date added to KEV. Severity and CVSS as stated by NVD or the vendor; EPSS from FIRST.org. "Patch by" is CISA's BOD 22-01 deadline for US federal agencies, a useful priority signal for everyone else. Machine-readable: /api/v1/vendors/fortinet.json.
Our Fortinet FortiOS and FortiProxy coverage
Other Fortinet products
Every row links to its CVE record with the CISA required action, catalog coverage and primary sources. We describe impact and remediation only; no exploit code. See the full KEV tracker or compare KEV catalogs.