AUGUST 4, 2026
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Case File

CVE-2021-36173

HIGH · CVSS 8 EPSS 1.44%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-12-08 · Last synced 2026-08-04

CyberRota Analysis

This is a high severity vulnerability with a CVSS score of 8.0. It affects FortiOS.

CVE
CVE-2021-36173
Severity
HIGH
CVSS
8
EPSS
1.44%
FortiOS

Original NVD Description

A heap-based buffer overflow in the firmware signature verification function of FortiOS versions 7.0.1, 7.0.0, 6.4.0 through 6.4.6, 6.2.0 through 6.2.9, and 6.0.0 through 6.0.13 may allow an attacker to execute arbitrary code via specially crafted installation images.

Related CVEs

Other vulnerabilities affecting the same vendor(s)