How severe is CVE-2026-26147?

CVE-2026-26147 has a CVSS 3.x base score of 7.7, rated high 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-2026-26147 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-26147?

CVE-2026-26147 affects Microsoft Azure Stack Hci. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-26147?

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-2026-26147 have an EU (EUVD) identifier?

Yes. CVE-2026-26147 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31516.

When was CVE-2026-26147 published?

CVE-2026-26147 was published on 2026-05-22 and last updated on 2026-06-17.

CVE-2026-26147

CVE-2026-26147 is a high-severity vulnerability in Microsoft Azure Stack Hci with a CVSS 3.x base score of 7.7. 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 7.7)
EPSS exploit prediction: 1% (43rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-31516
Weakness: CWE-20
Affected product: Microsoft Azure Stack Hci
Published: 2026-05-22
Last modified: 2026-06-17

Description

Improper input validation in Azure Compute Gallery allows an authorized attacker to disclose information over a network.

Frequently asked questions

What is CVE-2026-26147?: Improper input validation in Azure Compute Gallery allows an authorized attacker to disclose information over a network.
How severe is CVE-2026-26147?: CVE-2026-26147 has a CVSS 3.x base score of 7.7, rated high 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-2026-26147 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-26147?: CVE-2026-26147 affects Microsoft Azure Stack Hci. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-26147?: 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-2026-26147 have an EU (EUVD) identifier?: Yes. CVE-2026-26147 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31516.
When was CVE-2026-26147 published?: CVE-2026-26147 was published on 2026-05-22 and last updated on 2026-06-17.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26147

Affected products (1)

cpe:2.3:a:microsoft:azure_stack_hci:-:*:*:*:*:*:*:*

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