Unauthenticated privilege escalation via undisclosed access-control flaw
Published Sep 4, 2025 · Updated Feb 26, 2026
Improper access control in Microsoft Azure AI Bot Service allows remote attackers to elevate privileges via network requests. Microsoft has not published the affected component or the access-control operation that mishandles an untrusted request. Exploitation requires no prior privileges or user interaction but has high attack complexity; the resulting privilege level and permitted actions are undisclosed.
Summary
What happened
Improper access control in Microsoft Azure AI Bot Service allows remote attackers to elevate privileges via network requests. Microsoft has not published the affected component or the access-control operation that mishandles an untrusted request. Exploitation requires no prior privileges or user interaction but has high attack complexity; the resulting privilege level and permitted actions are undisclosed.
The record
- CVE
- CVE-2025-55244
- Published
- Sep 4, 2025
- Updated
- Feb 26, 2026
- Vendor
- Microsoft
- Product
- Azure AI Bot Service
- Classifications
- CWE-284
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 4, 2025CVE publishedPublication date reported by the CVE source.
- Feb 26, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=-
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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