How severe is CVE-2021-29140?

CVE-2021-29140 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability low.

Is CVE-2021-29140 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-29140?

CVE-2021-29140 affects Arubanetworks Clearpass. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-29140?

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-2021-29140 published?

CVE-2021-29140 was published on 2021-04-29 and last updated on 2026-06-17.

CVE-2021-29140

CVE-2021-29140 is a high-severity vulnerability in Arubanetworks Clearpass with a CVSS 3.x base score of 8.2. 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-611.

Key facts

Severity: High (CVSS 3.x base score 8.2)
CVSS v2: 6.4
EPSS exploit prediction: 2% (72nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-611
Affected product: Arubanetworks Clearpass
Published: 2021-04-29
Last modified: 2026-06-17

Description

A remote XML external entity (XXE) vulnerability was discovered in Aruba ClearPass Policy Manager version(s): Prior to 6.9.5, 6.8.9, 6.7.14-HF1. Aruba has released patches for Aruba ClearPass Policy Manager that address this security vulnerability.

Frequently asked questions

What is CVE-2021-29140?: A remote XML external entity (XXE) vulnerability was discovered in Aruba ClearPass Policy Manager version(s): Prior to 6.9.5, 6.8.9, 6.7.14-HF1. Aruba has released patches for Aruba ClearPass Policy Manager that address this security vulnerability.
How severe is CVE-2021-29140?: CVE-2021-29140 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability low.
Is CVE-2021-29140 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-29140?: CVE-2021-29140 affects Arubanetworks Clearpass. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-29140?: 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-2021-29140 published?: CVE-2021-29140 was published on 2021-04-29 and last updated on 2026-06-17.

References

https://www.arubanetworks.com/assets/alert/ARUBA-PSA-2021-009.txt

Affected products (1)

cpe:2.3:a:arubanetworks:clearpass:*:*:*:*:*:*:*:*

More vulnerabilities in Arubanetworks Clearpass

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CVE-2021-29145 — Critical (CVSS 9.8): A remote server side request forgery (SSRF) remote code execution vulnerability was discovered in Aruba ClearPass…
CVE-2020-7114 — Critical (CVSS 9.8): A vulnerability exists allowing attackers, when present in the same network segment as ClearPass' management interface,…
CVE-2016-4401 — Critical (CVSS 9.8): Aruba ClearPass Policy Manager before 6.5.7 and 6.6.x before 6.6.2 allows attackers to obtain database credentials.
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Other CWE-611 (Improper Restriction of XML External Entity Reference (XXE)) vulnerabilities

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CVE-2019-14678 — Critical (CVSS 10.0): SAS XML Mapper 9.45 has an XML External Entity (XXE) vulnerability that can be leveraged by malicious attackers in…
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CVE-2018-1000838 — Critical (CVSS 10.0): autopsy version <= 4.9.0 contains a XML External Entity (XXE) vulnerability in CaseMetadata XML Parser that can result…
CVE-2018-1000837 — Critical (CVSS 10.0): UML Designer version <= 8.0.0 contains a XML External Entity (XXE) vulnerability in XML parser for plugins that can…
CVE-2018-1000835 — Critical (CVSS 10.0): KeePassDX version <= 2.5.0.0beta17 contains a XML External Entity (XXE) vulnerability in kdbx file parser that can…

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