CVE-2025-55244
Published: 04 September 2025
Summary
CVE-2025-55244 is a critical-severity Improper Access Control (CWE-284) vulnerability in Microsoft Azure Ai Bot Service. Its CVSS base score is 9.0 (Critical).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 33.7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 AC-3 (Access Enforcement) and AC-6 (Least Privilege).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
Employs least privilege to directly prevent unauthorized elevation of privilege in Azure Bot Service by restricting access to only necessary permissions.
Enforces approved access authorizations, addressing the improper access control (CWE-284) that enables privilege escalation over the network.
Manages accounts to establish and maintain proper privilege levels, mitigating risks of elevation within the Azure Bot Service environment.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Direct remote EoP via improper access control in public-facing Azure Bot Service maps to exploitation for privilege escalation and public-facing app exploitation.
NVD Description
Azure Bot Service Elevation of Privilege Vulnerability
Deeper analysisAI
CVE-2025-55244 is an Elevation of Privilege vulnerability affecting Azure Bot Service. Published on 2025-09-04T23:15:33.333, it is associated with CWE-284 (Improper Access Control) and carries a CVSS v3.1 base score of 9.0 (AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H), indicating critical severity due to high impacts across confidentiality, integrity, and availability with a changed scope.
Attackers require no privileges or user interaction and can exploit the vulnerability over the network, though it demands high attack complexity. Successful exploitation enables elevation of privilege, potentially granting unauthorized high-level access within the affected Azure Bot Service environment.
Mitigation details are available in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-55244.
Details
- CWE(s)