What’s Vulnerable › Vulnerabilities

CVE-2021-44170

• Severity: medium (CVSS 6.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-07-18 · updated 2026-06-17
• Weakness: CWE-787

Description

A stack-based buffer overflow vulnerability [CWE-121] in the command line interpreter of FortiOS before 7.0.4 and FortiProxy before 2.0.8 may allow an authenticated attacker to execute unauthorized code or commands via specially crafted command line arguments.

Affected products

• Fortinet FortiOS (FortiGate): from 6.0.0 through 6.0.14; from 6.2.0 before 6.2.11; from 6.4.0 before 6.4.9; from 7.0.0 through 7.0.2 — fixed in 6.2.11, 6.4.9
• Fortinet FortiProxy: from 1.0.0 through 1.0.7; from 1.1.0 through 1.1.6; from 1.2.0 through 1.2.13; from 2.0.0 before 2.0.8 — fixed in 2.0.8

How to fix

Upgrade to a fixed version: Fortinet FortiOS (FortiGate) 6.2.11, 6.4.9; Fortinet FortiProxy 2.0.8. Check the vendor advisory for mitigations.

References

• https://fortiguard.com/psirt/FG-IR-21-179
• https://fortiguard.com/psirt/FG-IR-21-179

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