How severe is CVE-2021-26684?

CVE-2021-26684 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-26684 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-26684?

CVE-2021-26684 affects Arubanetworks Clearpass Policy Manager. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-26684?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-26684 published?

CVE-2021-26684 was published on 2021-02-23 and last updated on 2026-06-17.

CVE-2021-26684

CVE-2021-26684 is a high-severity vulnerability in Arubanetworks Clearpass Policy Manager with a CVSS 3.x base score of 7.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-78.

Key facts

Severity: High (CVSS 3.x base score 7.2)
CVSS v2: 9.0
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Arubanetworks Clearpass Policy Manager
Published: 2021-02-23
Last modified: 2026-06-17

Description

A remote authenticated command injection vulnerability was discovered in Aruba ClearPass Policy Manager version(s): Prior to 6.9.5, 6.8.8-HF1, 6.7.14-HF1. A vulnerability in the ClearPass web-based management interface allows remote authenticated users to run arbitrary commands on the underlying host. A successful exploit could allow an attacker to execute arbitrary commands as root on the underlying operating system leading to complete system compromise.

Frequently asked questions

What is CVE-2021-26684?: A remote authenticated command injection vulnerability was discovered in Aruba ClearPass Policy Manager version(s): Prior to 6.9.5, 6.8.8-HF1, 6.7.14-HF1. A vulnerability in the ClearPass web-based management interface allows remote authenticated users to run arbitrary commands on the underlying host. A successful exploit could allow an attacker to execute arbitrary commands as root on the underlying operating system leading to complete system compromise.
How severe is CVE-2021-26684?: CVE-2021-26684 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-26684 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-26684?: CVE-2021-26684 affects Arubanetworks Clearpass Policy Manager. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-26684?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-26684 published?: CVE-2021-26684 was published on 2021-02-23 and last updated on 2026-06-17.

References

https://www.arubanetworks.com/assets/alert/ARUBA-PSA-2021-004.txt

Affected products (1)

cpe:2.3:a:arubanetworks:clearpass_policy_manager:*:*:*:*:*:*:*:*

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