How severe is CVE-2025-21188?

CVE-2025-21188 has a CVSS 3.x base score of 6.0, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2025-21188 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-21188?

CVE-2025-21188 affects Microsoft Azure Network Watcher. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-21188?

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

Does CVE-2025-21188 have an EU (EUVD) identifier?

Yes. CVE-2025-21188 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-2267.

When was CVE-2025-21188 published?

CVE-2025-21188 was published on 2025-02-11 and last updated on 2026-06-17.

CVE-2025-21188

CVE-2025-21188 is a medium-severity vulnerability in Microsoft Azure Network Watcher with a CVSS 3.x base score of 6.0. 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-59.

Key facts

Severity: Medium (CVSS 3.x base score 6.0)
EPSS exploit prediction: 1% (47th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-2267
Weakness: CWE-59
Affected product: Microsoft Azure Network Watcher
Published: 2025-02-11
Last modified: 2026-06-17

Description

Azure Network Watcher VM Extension Elevation of Privilege Vulnerability

Frequently asked questions

What is CVE-2025-21188?: Azure Network Watcher VM Extension Elevation of Privilege Vulnerability
How severe is CVE-2025-21188?: CVE-2025-21188 has a CVSS 3.x base score of 6.0, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2025-21188 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-21188?: CVE-2025-21188 affects Microsoft Azure Network Watcher. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-21188?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-21188 have an EU (EUVD) identifier?: Yes. CVE-2025-21188 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-2267.
When was CVE-2025-21188 published?: CVE-2025-21188 was published on 2025-02-11 and last updated on 2026-06-17.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21188

Affected products (1)

cpe:2.3:a:microsoft:azure_network_watcher:*:*:*:*:*:*:*:*

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