CVE-2021-43072

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: 2023-07-18 · updated 2026-06-17
Weakness: CWE-120

Description

A buffer copy without checking size of input ('classic buffer overflow') in Fortinet FortiAnalyzer version 7.0.2 and below, version 6.4.7 and below, version 6.2.9 and below, version 6.0.11 and below, version 5.6.11 and below, FortiManager version 7.0.2 and below, version 6.4.7 and below, version 6.2.9 and below, version 6.0.11 and below, version 5.6.11 and below, FortiOS version 7.0.0 through 7.0.4, 6.4.0 through 6.4.8, 6.2.0 through 6.2.10, 6.0.x and FortiProxy version 7.0.0 through 7.0.3, 2.0.0 through 2.0.8, 1.2.x, 1.1.x and 1.0.x allows attacker to execute unauthorized code or commands via crafted CLI `execute restore image` and `execute certificate remote` operations with the tFTP protocol.

Affected products

Fortinet FortiAnalyzer: from 5.6.0 before 6.4.8; from 7.0.0 before 7.0.3 — fixed in 6.4.8, 7.0.3
Fortinet FortiManager: from 5.6.0 before 6.4.8; from 7.0.0 before 7.0.3 — fixed in 6.4.8, 7.0.3
Fortinet FortiOS (FortiGate): from 6.0.0 before 6.2.11; from 6.4.0 before 6.4.9; from 7.0.0 before 7.0.6 — fixed in 6.2.11, 6.4.9, 7.0.6
Fortinet FortiProxy: from 1.0.0 before 2.0.9; from 7.0.0 before 7.0.4 — fixed in 2.0.9, 7.0.4

How to fix

Upgrade to a fixed version: Fortinet FortiAnalyzer 6.4.8, 7.0.3; Fortinet FortiManager 6.4.8, 7.0.3; Fortinet FortiOS (FortiGate) 6.2.11, 6.4.9, 7.0.6; Fortinet FortiProxy 2.0.9, 7.0.4. Check the vendor advisory for mitigations.

References

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