Fortinet FortiOS and FortiProxy
YES - ON THE CISA KEV LIST
CVE-2018-13383
Fortinet FortiOS and FortiProxy Out-of-bounds Write
overdue since 2022-07-10
Fortinet: 32 entries (1.8% of all KEV entries are from this vendor); 9 added in 2026.
BOD 26-04 note: this is the date printed in the CISA catalog. A federal agency's actual deadline is set by its SSVC tier - Act (3 days), Attend (14 days), Track (60 days), or the next scheduled upgrade - counted from the KEV listing date or the date the vulnerability is identified in its environment, whichever comes first. Use the tier helper on each CVE page for your own window.
Your BOD 26-04 window (SSVC tier helper)
Your remediation window ends:
Description
A heap buffer overflow in Fortinet FortiOS and FortiProxy may cause the SSL VPN web service termination for logged in users.
Required action (CISA)
Apply updates per vendor instructions.
Notes
https://nvd.nist.gov/vuln/detail/CVE-2018-13383
References
Other KEV entries for this vendor: Fortinet
- CVE-2025-61624 - Multiple Products (2026-10-16)
- CVE-2026-104286 - FortiMail (2026-10-01)
- CVE-2025-25249 - Multiple Products (2026-09-09)
- CVE-2025-68686 - FortiOS (2026-07-27)
- CVE-2026-25089 - FortiSandbox (2026-07-16)
- CVE-2026-39808 - FortiSandbox (2026-07-16)
- CVE-2026-21643 - FortiClient EMS (2026-04-13)
- CVE-2026-35616 - FortiClient EMS (2026-04-06)
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