How severe is CVE-2025-66170?

CVE-2025-66170 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2025-66170 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-66170?

CVE-2025-66170 affects Apache Cloudstack. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-66170?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-66170 have an EU (EUVD) identifier?

Yes. CVE-2025-66170 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-209740.

When was CVE-2025-66170 published?

CVE-2025-66170 was published on 2026-05-08 and last updated on 2026-06-17.

CVE-2025-66170

CVE-2025-66170 is a medium-severity vulnerability in Apache Cloudstack with a CVSS 3.x base score of 6.5. 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-863.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (38th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-209740
Weakness: CWE-863
Affected product: Apache Cloudstack
Published: 2026-05-08
Last modified: 2026-06-17

Description

The CloudStack Backup plugin has an improper authorization logic in versions 4.21.0.0 and 4.22.0.0. Anyone with authenticated user-account access in CloudStack 4.21.0.0+ environments, where this plugin is enabled and has access to specific APIs can list backups from any account in the environment. This vulnerability does not allow them to see the contents of the backup. Users are recommended to upgrade to version 4.22.0.1, which fixes the issue.

Frequently asked questions

What is CVE-2025-66170?: The CloudStack Backup plugin has an improper authorization logic in versions 4.21.0.0 and 4.22.0.0. Anyone with authenticated user-account access in CloudStack 4.21.0.0+ environments, where this plugin is enabled and has access to specific APIs can list backups from any account in the environment. This vulnerability does not allow them to see the contents of the backup. Users are recommended to upgrade to version 4.22.0.1, which fixes the issue.
How severe is CVE-2025-66170?: CVE-2025-66170 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2025-66170 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-66170?: CVE-2025-66170 affects Apache Cloudstack. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-66170?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-66170 have an EU (EUVD) identifier?: Yes. CVE-2025-66170 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-209740.
When was CVE-2025-66170 published?: CVE-2025-66170 was published on 2026-05-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:apache:cloudstack:*:*:*:*:*:*:*:*

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