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CVE-2025-21188

18
FAUCET Score

CVE-2025-21188 is an Elevation of Privilege vulnerability affecting the Microsoft Azure Network Watcher VM Extension. With a CVSS score of 6.0 (Medium), it allows a highly privileged local attacker to achieve high impact to integrity and availability. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or inclusion in CISA's KEV catalog, though it has garnered some community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.4.3563.1CPE matchmatch criteria
cpe:2.3:a:microsoft:azure_network_watcher:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.0MEDIUM

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
0.8
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.70%
Probability of exploitation in next 30 days
EPSS Percentile
49.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0070 is in the 95th percentile among its peer group of 3,720 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: Azure Network Watcher VM ExtensionFixed in: 1.4.3563.1
View patch

Vendor Advisories (1)

microsoft2025-Feb/CVE-2025-21188Important

Azure Network Watcher VM Extension Elevation of Privilege Vulnerability

Feb 11, 2025

References

msrc.microsoft.com / update-guide/vulnerability/CVE-2025-21188
PatchVendor Advisory