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CVE-2025-26685

23
FAUCET Score

CVE-2025-26685 is an improper authentication vulnerability in Microsoft Defender for Identity, allowing an unauthenticated attacker to spoof identities over an adjacent network. With a CVSS score of 6.5 (Medium), it requires low attack complexity and grants high confidentiality impact without user interaction. While not currently in the KEV catalog and lacking public exploit code, its high community discussion and media coverage indicate significant attention. Organizations should prioritize patching to mitigate the risk of spoofing attacks.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:microsoft:defender_for_identity:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.63%
Probability of exploitation in next 30 days
EPSS Percentile
46.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0063 is in the 72nd percentile among its peer group of 1,802 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 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

Vendor Patches (1)

microsoftvendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

microsoft2025-May/CVE-2025-26685Important

Microsoft Defender for Identity Spoofing Vulnerability

May 13, 2025

References

msrc.microsoft.com / update-guide/vulnerability/CVE-2025-26685
Vendor Advisory