Authenticated privilege escalation via missing authorization
Published Jun 19, 2026 · Updated Jun 19, 2026
Missing authorization in Microsoft Exchange Online allows remote authenticated users to elevate privileges through network requests. Microsoft has not disclosed the affected endpoint, authorization decision, or request field that permits the privilege change. A low-privileged Exchange Online identity is required; Microsoft has not specified the resulting privileged role or reachable operations.
Summary
What happened
Missing authorization in Microsoft Exchange Online allows remote authenticated users to elevate privileges through network requests. Microsoft has not disclosed the affected endpoint, authorization decision, or request field that permits the privilege change. A low-privileged Exchange Online identity is required; Microsoft has not specified the resulting privileged role or reachable operations.
The record
- CVE
- CVE-2026-48582
- Published
- Jun 19, 2026
- Updated
- Jun 19, 2026
- Vendor
- Microsoft
- Product
- Microsoft Exchange Online
- Classifications
- CWE-862
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 19, 2026CVE publishedPublication date reported by the CVE source.
- Jun 19, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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