Fortinet vulnerabilities and fixes

CVEs that mention Fortinet, ranked by priority. 14 tracked.

Fortinet has 14 tracked vulnerabilities, 3 critical and 4 exploited in the wild (CISA KEV). A fixed release or vendor patch exists for 13. Most recent: 2026-10-13. Highest priority: CVE-2024-21762 (score 100/100).

• CVE-2024-21762 CRITICAL 9.8 EXPLOITED UPGRADE UPGRADE Fortinet FortiOS Out-of-Bound Write Vulnerability
• CVE-2026-104286 CRITICAL 9.8 EXPLOITED UPGRADE Fortinet FortiMail Path Traversal Vulnerability
• CVE-2025-25249 HIGH 8.1 EXPLOITED UPGRADE UPGRADE Fortinet Multiple Products Heap-based Buffer Overflow Vulnerability
• CVE-2025-61624 MEDIUM 6.0 EXPLOITED UPGRADE UPGRADE Fortinet Multiple Products Path Traversal Vulnerability
• CVE-2026-26035 CRITICAL 9.8 UPGRADE An Improper Authentication vulnerability [CWE-287] vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.2, For
• CVE-2026-70465 HIGH 8.1 UPGRADE A buffer copy without checking size of input ('classic buffer overflow') vulnerability in Fortinet FortiClient
• CVE-2026-70468 HIGH 8.1 UPGRADE UPGRADE A authentication bypass using an alternate path or channel vulnerability in Fortinet FortiManager 7.6.1, Forti
• CVE-2025-57739 HIGH 8.8 An improper neutralization of special elements used in an SQL Command ("SQL Injection") vulnerability [CWE-89]
• CVE-2026-71407 MEDIUM 5.6 UPGRADE A Stack-based Buffer Overflow vulnerability [CWE-121] vulnerability in Fortinet FortiOS 7.6.1 through 7.6.6 ma
• CVE-2026-71408 MEDIUM 5.3 UPGRADE A allocation of resources without limits or throttling vulnerability in Fortinet FortiOS 7.6.0 through 7.6.6,
• CVE-2026-23705 HIGH 7.2 An Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability [CWE-89]
• CVE-2026-70466 MEDIUM 5.3 UPGRADE A incomplete list of disallowed inputs vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.2, FortiWeb 7.6.0
• CVE-2026-23706 MEDIUM 6.5 An Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability [CWE-89]
• CVE-2026-70467 LOW 3.8 UPGRADE A server-side request forgery (ssrf) vulnerability in Fortinet FortiSIEM 7.5.0, FortiSIEM 7.4.0 through 7.4.2,

FAQ

How do I fix Fortinet vulnerabilities?

Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.

Is Fortinet being exploited right now?

Yes: 4 Fortinet CVEs are on the CISA Known Exploited Vulnerabilities list, so patch those first.

Which Fortinet CVE should I patch first?

CVE-2024-21762 currently ranks highest (100/100): Fortinet FortiOS Out-of-Bound Write Vulnerability.

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