How severe is CVE-2025-64663?

CVE-2025-64663 has a CVSS 3.x base score of 9.9, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-64663 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-64663?

CVE-2025-64663 affects Microsoft Azure Language. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-64663?

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

Does CVE-2025-64663 have an EU (EUVD) identifier?

Yes. CVE-2025-64663 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-204416.

When was CVE-2025-64663 published?

CVE-2025-64663 was published on 2025-12-18 and last updated on 2026-06-17.

CVE-2025-64663

CVE-2025-64663 is a critical-severity vulnerability in Microsoft Azure Language with a CVSS 3.x base score of 9.9. 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-918.

Key facts

Severity: Critical (CVSS 3.x base score 9.9)
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-204416
Weakness: CWE-918
Affected product: Microsoft Azure Language
Published: 2025-12-18
Last modified: 2026-06-17

Description

Custom Question Answering Elevation of Privilege Vulnerability

Frequently asked questions

What is CVE-2025-64663?: Custom Question Answering Elevation of Privilege Vulnerability
How severe is CVE-2025-64663?: CVE-2025-64663 has a CVSS 3.x base score of 9.9, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-64663 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-64663?: CVE-2025-64663 affects Microsoft Azure Language. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-64663?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-64663 have an EU (EUVD) identifier?: Yes. CVE-2025-64663 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-204416.
When was CVE-2025-64663 published?: CVE-2025-64663 was published on 2025-12-18 and last updated on 2026-06-17.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-64663

Affected products (1)

cpe:2.3:a:microsoft:azure_language:-:*:*:*:*:*:*:*

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