FortiSASE vulnerabilities

3 known vulnerabilities in FortiSASE from Fortinet. 3 are rated high or critical, and 1 has been exploited in real attacks. Each entry lists the affected versions and the release that fixes it, where the vendor has published one.

Latest first

• 9.8 Critical severity

  Fortinet Multiple Products Heap-based Buffer Overflow Exploited

  CVE-2025-25249Jan 13, 2026FortinetEPSS 3.74%

  A heap-based buffer overflow vulnerability in Fortinet FortiOS 7.6.0 through 7.6.3, FortiOS 7.4.0 through 7.4.8, FortiOS 7.2.0 through 7.2.11, FortiOS 7.0.0 through 7.0.17, FortiOS 6.4 all versions, FortiSwitchManager 7.2.0 through 7.2.6, FortiSwitchManager 7.

• 7.5 High severity

  FortiOS: Out-of-bounds Write

  CVE-2025-58413Nov 18, 2025Fortinet

  A stack-based buffer overflow vulnerability in Fortinet FortiOS 7.6.0 through 7.6.3, FortiOS 7.4.0 through 7.4.8, FortiOS 7.2 all versions, FortiOS 7.0 all versions, FortiOS 6.4 all versions, FortiOS 6.2 all versions, FortiOS 6.0 all versions, FortiSASE 25.3.b

• 9.8 Critical severity

  FortiProxy: Out-of-bounds Write

  CVE-2023-42789Mar 12, 2024FortinetEPSS 3.31%

  A out-of-bounds write vulnerability in Fortinet FortiOS 7.4.0 through 7.4.1, FortiOS 7.2.0 through 7.2.5, FortiOS 7.0.0 through 7.0.12, FortiOS 6.4.0 through 6.4.14, FortiOS 6.2.0 through 6.2.15, FortiProxy 7.4.0, FortiProxy 7.2.0 through 7.2.6, FortiProxy 7.0