CVE-2018-21152

Authenticated command injection

Published Apr 27, 2020 · Updated Aug 5, 2024

Command injection in NETGEAR router firmware before the listed fixed versions allows remote authenticated users to execute operating-system commands. The vendor identifies post-authentication command injection but does not publish the vulnerable endpoint, parameter, or sanitization failure. Access requires an authenticated adjacent-network user with high privileges, and successful execution can compromise confidentiality, integrity, and availability.

CVSS severity6.8
Medium
EPSS probability0.85%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in NETGEAR router firmware before the listed fixed versions allows remote authenticated users to execute operating-system commands. The vendor identifies post-authentication command injection but does not publish the vulnerable endpoint, parameter, or sanitization failure. Access requires an authenticated adjacent-network user with high privileges, and successful execution can compromise confidentiality, integrity, and availability.

The record

CVE
CVE-2018-21152
Published
Apr 27, 2020
Updated
Aug 5, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-78, T1059
Attack vector
adjacent
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 27, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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 vectoradjacent
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.2NVDAV:A/AC:L/Au:S/C:P/I:P/A:P
6.8MITRE CNACVSS:3.0/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
6.8NVDCVSS:3.1/AV:A/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)
Vectoradjacent
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
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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