What is CVE-2025-55241?

CVE-2025-55241 is a critical-severity vulnerability in Microsoft Entra Id, classified under Improper Authentication. CVSS score: 10.0/10. Published 2025-09-04.

How severe is CVE-2025-55241?

Critical severity. CVSS v3 base score is 10.0 out of 10.

Is CVE-2025-55241 known to be exploited?

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

Auth bypass in Microsoft Entra Id

CVE-2025-55241

Azure Entra ID Elevation of Privilege Vulnerability

Vulnerability class: Broken Authentication

Published 2025-09-04 · last modified 2026-10-18.

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.016 (75.8th percentile), scored 2026-10-24.

Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 75.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: +0.001

Affected products

Weakness classification (CWE)

CWE-287 — Improper Authentication

Public proof-of-concept exploits

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2025-55241 (vendor-advisory, patch, Vendor Advisory)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (Technical Description, Third Party Advisory)

Frequently asked questions

What is CVE-2025-55241?: CVE-2025-55241 is a critical-severity vulnerability in Microsoft Entra Id, classified under Improper Authentication. CVSS score: 10.0/10. Published 2025-09-04.
How severe is CVE-2025-55241?: Critical severity. CVSS v3 base score is 10.0 out of 10.
Is CVE-2025-55241 known to be exploited?: 8 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.