How severe is CVE-2025-27489?

CVE-2025-27489 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-27489 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-27489?

CVE-2025-27489 primarily affects Microsoft Azure Stack Hci 22h2. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-27489?

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.

Does CVE-2025-27489 have an EU (EUVD) identifier?

Yes. CVE-2025-27489 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-10165.

When was CVE-2025-27489 published?

CVE-2025-27489 was published on 2025-04-08 and last updated on 2026-06-17.

CVE-2025-27489

CVE-2025-27489 is a high-severity vulnerability in Microsoft Azure Stack Hci 22h2 with a CVSS 3.x base score of 7.8. 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-20.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 1% (41st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-10165
Weakness: CWE-20
Affected product: Microsoft Azure Stack Hci 22h2
Published: 2025-04-08
Last modified: 2026-06-17

Description

Improper input validation in Azure Local allows an authorized attacker to elevate privileges locally.

Frequently asked questions

What is CVE-2025-27489?: Improper input validation in Azure Local allows an authorized attacker to elevate privileges locally.
How severe is CVE-2025-27489?: CVE-2025-27489 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-27489 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-27489?: CVE-2025-27489 primarily affects Microsoft Azure Stack Hci 22h2. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-27489?: 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.
Does CVE-2025-27489 have an EU (EUVD) identifier?: Yes. CVE-2025-27489 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-10165.
When was CVE-2025-27489 published?: CVE-2025-27489 was published on 2025-04-08 and last updated on 2026-06-17.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-27489

Affected products (2)

cpe:2.3:o:microsoft:azure_stack_hci_22h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:azure_stack_hci_23h2:*:*:*:*:*:*:*:*

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