Local privilege escalation
Published Jul 14, 2026 · Updated Jul 14, 2026
Insufficient access-control granularity in Microsoft Exchange Server allows local users with low privileges to elevate privileges. Microsoft has not published the affected component or the operation whose access-control granularity is insufficient. Local access and existing low privileges are required; successful exploitation grants higher local privileges, but the resulting privilege level is undisclosed.
Summary
What happened
Insufficient access-control granularity in Microsoft Exchange Server allows local users with low privileges to elevate privileges. Microsoft has not published the affected component or the operation whose access-control granularity is insufficient. Local access and existing low privileges are required; successful exploitation grants higher local privileges, but the resulting privilege level is undisclosed.
The record
- CVE
- CVE-2026-55006
- Published
- Jul 14, 2026
- Updated
- Jul 14, 2026
- Vendor
- Microsoft
- Product
- Microsoft Exchange Server 2019 Cumulative Update 14
- Classifications
- CWE-1220, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 14, 2026CVE publishedPublication date reported by the CVE source.
- Jul 14, 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 <15.02.1544.043
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.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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