What is CVE-2025-26685?

CVE-2025-26685 is a medium-severity vulnerability in Microsoft Defender_for_identity, classified under Improper Authentication. CVSS score: 6.5/10. Published 2025-05-13.

How severe is CVE-2025-26685?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Is CVE-2025-26685 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Auth bypass in Microsoft Defender_for_identity

CVE-2025-26685

Improper authentication in Microsoft Defender for Identity allows an unauthorized attacker to perform spoofing over an adjacent network.

Vulnerability class: Broken Authentication

EPSS: 0.006 (45.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Weakness classification (CWE)

CWE-287 — Improper Authentication

Public proof-of-concept exploits

ARPSyndicate/cve-scores

References

secure@microsoft.com (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2025-26685?: CVE-2025-26685 is a medium-severity vulnerability in Microsoft Defender_for_identity, classified under Improper Authentication. CVSS score: 6.5/10. Published 2025-05-13.
How severe is CVE-2025-26685?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2025-26685 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.