CVE-2021-29147Network attack vector

Authenticated command execution via TACACS+ input injection

Published Apr 29, 2021 · Updated Aug 3, 2024

Command injection in HPE ClearPass 6.9.x before 6.9.4, 6.8.x before 6.8.8, and 6.7.x before 6.7.14-HF1 allows attackers to execute OS commands. The TACACS+ server accepts crafted protocol input that reaches operating-system command execution without adequate neutralization; HPE has not disclosed the responsible request field or function. Exploitation requires authenticated access to the TACACS+ service and grants command execution on the ClearPass host.

CVSS severity7.3
High
EPSS probability3.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Command injection in HPE ClearPass 6.9.x before 6.9.4, 6.8.x before 6.8.8, and 6.7.x before 6.7.14-HF1 allows attackers to execute OS commands. The TACACS+ server accepts crafted protocol input that reaches operating-system command execution without adequate neutralization; HPE has not disclosed the responsible request field or function. Exploitation requires authenticated access to the TACACS+ service and grants command execution on the ClearPass host.

The record

CVE
CVE-2021-29147
Published
Apr 29, 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. Apr 29, 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, 6.8.9, 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, 6.8.9, 6.7.14-HF1

Published CVSS scores

8.8NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.5Hewlett Packard EnterpriseAV:N/AC:L/Au:N/C:P/I:P/A:P
7.3Hewlett Packard EnterpriseCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
9.0NIST National Vulnerability DatabaseAV:N/AC:L/Au:S/C:C/I:C/A:C

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo