Medium [CVE-2026-62915] Microsoft Exchange Server Security Feature Bypass Vulnerability
This medium-severity Microsoft Server advisory covers CVE-2026-62915 affecting Microsoft Exchange Server 2016 Cumulative Update 23, Microsoft Exchange Server 2019 Cumulative Update 14, Microsoft Exchange Server 2019 Cumulative Update 15.
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Summary
Missing authorization in Microsoft Exchange Server allows an authorized attacker to bypass a security feature over a network.
Affected products named by the advisory: Microsoft Exchange Server 2016 Cumulative Update 23; Microsoft Exchange Server 2019 Cumulative Update 14; Microsoft Exchange Server 2019 Cumulative Update 15; Microsoft Exchange Server Subscription Edition RTM.
- Microsoft Exchange Server 2016 Cumulative Update 23 15.01.0.0 before 15.01.2507.072
- Microsoft Exchange Server 2019 Cumulative Update 14 15.02.0.0 before 15.02.1544.044
- Microsoft Exchange Server 2019 Cumulative Update 15 15.02.0.0 before 15.02.1748.049
- Microsoft Exchange Server Subscription Edition RTM 15.02.0.0 before 15.02.2562.046
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
- 15.01.2507.072
- 15.02.1544.044
- 15.02.1748.049
- 15.02.2562.046
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
Mitigation
Upgrade to a fixed release: 15.01.2507.072, 15.02.1544.044, 15.02.1748.049, 15.02.2562.046. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
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