What’s Vulnerable › Vulnerabilities

CVE-2026-59837

• Severity: medium (CVSS 6.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-14 · updated 2026-10-24
• Weakness: CWE-121

Description

A stack-based buffer overflow vulnerability in Fortinet FortiOS 7.4.0 through 7.4.1, FortiOS 7.2 all versions, FortiPAM 1.8.0 through 1.8.2, FortiPAM 1.7 all versions, FortiPAM 1.6 all versions, FortiPAM 1.5 all versions, FortiPAM 1.4 all versions, FortiPAM 1.3 all versions, FortiPAM 1.2 all versions, FortiPAM 1.1 all versions, FortiPAM 1.0 all versions, FortiProxy 7.4.0 through 7.4.13, FortiProxy 7.2 all versions may allow a privileged authenticated attacker who can bypass stack protection and ASLR to execute arbitrary code or commands via crafted HTTP requests.

Affected products

• Fortinet FortiOS (FortiGate): from 7.2.0 before 7.4.2 — fixed in 7.4.2
• Fortinet FortiPAM: from 1.0.0 before 1.8.3 — fixed in 1.8.3
• Fortinet FortiProxy: from 7.2.0 before 7.4.14 — fixed in 7.4.14

How to fix

Upgrade to a fixed version: Fortinet FortiOS (FortiGate) 7.4.2; Fortinet FortiPAM 1.8.3; Fortinet FortiProxy 7.4.14. Check the vendor advisory for mitigations.

References

• https://fortiguard.fortinet.com/psirt/FG-IR-26-148
• https://cert-portal.siemens.com/productcert/html/ssa-864900.html

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