Authenticated privilege escalation
Published Sep 8, 2026 · Updated Sep 9, 2026
Missing authorization in Microsoft Exchange Server allows remote authenticated users to elevate privileges over a network. Microsoft has not disclosed the affected component, request path, or authorization operation that fails to enforce the required privilege check. Low-privilege access is required; exploitation needs no user interaction and grants elevated read and write access without a reported service interruption.
Summary
What happened
Missing authorization in Microsoft Exchange Server allows remote authenticated users to elevate privileges over a network. Microsoft has not disclosed the affected component, request path, or authorization operation that fails to enforce the required privilege check. Low-privilege access is required; exploitation needs no user interaction and grants elevated read and write access without a reported service interruption.
The record
- CVE
- CVE-2026-69380
- Published
- Sep 8, 2026
- Updated
- Sep 9, 2026
- Vendor
- Microsoft
- Product
- Microsoft Exchange Server 2019 Cumulative Update 14
- Classifications
- CWE-862, T1068
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 8, 2026CVE publishedPublication date reported by the CVE source.
- Sep 9, 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=15.02.0.0 <15.02.1544.046
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.
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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