FO
Network Security
FortiOS
by Fortinet · last CVE Oct 27, 2026
On CISA KEVExploited in the wildRansomware-linked
282
CVEs
21
On KEV
9.8
Max CVSS
2
New 30D
Severity mix
Critical 23High 86Medium 146Low 10
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CVECVSSEPSSPublishedSummary · affected versions
CVE-2026-24858
In wildKEV
9.8
87%
Jan 27
Fortinet Multiple Products Authentication Bypass Using an Alternate Path or Channel Vulnerability
Affected: 7.6.0 through 7.6.5; 7.4.0 through 7.4.10; 7.2.0 through 7.2.12; 7.0.0 through 7.0.18
CVE-2025-25249
In wildKEV
9.8
4%
Jan 13
Fortinet Multiple Products Heap-based Buffer Overflow Vulnerability
Affected: 7.6.0 through 7.6.2; 7.4.0 through 7.4.7; 7.2.4 through 7.2.11
CVE-2025-59718
In wildKEV
9.8
68%
Dec 9
Fortinet Multiple Products Improper Verification of Cryptographic Signature Vulnerability
Affected: 7.6.0 through 7.6.3; 7.4.0 through 7.4.8; 7.2.0 through 7.2.11; 7.0.0 through 7.0.17
CVE-2024-55591
RansomwareIn wildKEV
9.8
94%
Jan 14
Fortinet FortiOS and FortiProxy Authentication Bypass Vulnerability
Affected: 7.0.0 through 7.0.16
CVE-2024-23113
In wildKEV
9.8
62%
Feb 15
Fortinet Multiple Products Format String Vulnerability
Affected: 7.4.0 through 7.4.2; 7.2.0 through 7.2.6; 7.0.0 through 7.0.13
CVE-2024-21762
RansomwareIn wildKEV
9.8
85%
Feb 9
Fortinet FortiOS Out-of-Bound Write Vulnerability
Affected: 7.4.0 through 7.4.2; 7.2.0 through 7.2.6; 7.0.0 through 7.0.13; 6.4.0 through 6.4.14; 6.2.0 through 6.2.15; 6.0.0 through 6.0.18
CVE-2023-27997
RansomwareIn wildKEV
9.8
86%
Jun 13
Fortinet FortiOS and FortiProxy SSL-VPN Heap-Based Buffer Overflow Vulnerability
Affected: 7.2.0 through 7.2.4; 7.0.0 through 7.0.11; 6.4.0 through 6.4.12; 6.2.0 through 6.2.13; 6.0.0 through 6.0.16
CVE-2022-42475
RansomwareIn wildKEV
9.8
99%
Jan 2
Fortinet FortiOS Heap-Based Buffer Overflow Vulnerability
Affected: 7.2.0 through 7.2.2; 7.0.0 through 7.0.8; 6.4.0 through 6.4.10; 6.2.0 through 6.2.11; 6.0.0 through 6.0.15; 5.6.0 through 5.6.14; +3 more
CVE-2022-40684
RansomwareIn wildKEV
9.8
100%
Oct 18
Fortinet Multiple Products Authentication Bypass Vulnerability
Affected: 7.0.0 before 7.0.7; 7.2.0 before 7.2.2
CVE-2020-12812
RansomwareIn wildKEV
9.8
45%
Jul 24
Fortinet FortiOS SSL VPN Improper Authentication Vulnerability
Affected: FortiOS 6.4.0, 6.2.0 to 6.2.3, 6.0.9 and below
CVE-2018-13379
RansomwareIn wildKEV
9.8
100%
Jun 4
Fortinet FortiOS SSL VPN Path Traversal Vulnerability
Affected: 5.4.6 before 5.4.13; 5.6.3 before 5.6.8; 6.0.0 before 6.0.5
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