CVE-2021-44170

Authenticated code execution via command-line buffer overflow

Published Jul 18, 2022 · Updated Oct 25, 2024

Stack-based buffer overflow in Fortinet FortiOS before 7.0.4 and FortiProxy before 2.0.8 allows local users to execute code. The command-line interpreter fails to bound specially crafted command-line arguments, causing data to overrun a stack buffer. Exploitation requires a locally authenticated, high-privilege session and permits unauthorized code or command execution with the appliance's privileges.

CVSS severity6.7
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in Fortinet FortiOS before 7.0.4 and FortiProxy before 2.0.8 allows local users to execute code. The command-line interpreter fails to bound specially crafted command-line arguments, causing data to overrun a stack buffer. Exploitation requires a locally authenticated, high-privilege session and permits unauthorized code or command execution with the appliance's privileges.

The record

CVE
CVE-2021-44170
Published
Jul 18, 2022
Updated
Oct 25, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1059
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jul 18, 2022CVE publishedPublication date reported by the CVE source.
  2. Oct 25, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.7Fortinet, Inc.CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
6.7NIST NVDCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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