CVE-2021-26684Network attack vector

Authenticated command injection via ClearPass WebUI

Published Feb 23, 2021 · Updated Aug 3, 2024

Command injection in ClearPass Policy Manager before 6.9.5 allows remote authenticated users to execute arbitrary commands through its web interface. The web-based management interface fails to neutralize attacker-controlled command input, allowing commands to run as root on the underlying appliance operating system. Exploitation requires valid remote management credentials and can provide complete system compromise, including control of confidentiality, integrity, and availability.

CVSS severity7.2
High
EPSS probability2.51%
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 ClearPass Policy Manager before 6.9.5 allows remote authenticated users to execute arbitrary commands through its web interface. The web-based management interface fails to neutralize attacker-controlled command input, allowing commands to run as root on the underlying appliance operating system. Exploitation requires valid remote management credentials and can provide complete system compromise, including control of confidentiality, integrity, and availability.

The record

CVE
CVE-2021-26684
Published
Feb 23, 2021
Updated
Aug 3, 2024
Vendor
Hewlett Packard Enterprise (HPE)
Product
HPE Aruba Networking ClearPass Policy Manager
Classifications
CWE-78, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 23, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Prior to 6.9.5, 6.8.8-HF1, 6.7.14-HF1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Hewlett Packard Enterprise (HPE) · HPE Aruba Networking ClearPass Policy Managerversion=Prior to 6.9.5, 6.8.8-HF1, 6.7.14-HF1

Published CVSS scores

9.0NISTAV:N/AC:L/Au:S/C:C/I:C/A:C
7.2NISTCVSS:3.1/AV:N/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)
Vectornetwork
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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