7.5
High
CVE-2026-87696 Improper verification of cryptographic signature in Microsoft Exchange Server allows an authorized attacker to elevate…
Description
Improper verification of cryptographic signature in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Microsoft Exchange Server 2016 Cumulative Update 23 15.01 | 15.01.0.0 → < 15.01.2507.077 | 15.01.2507.077 |
| Microsoft Exchange Server 2019 Cumulative Update 14 15.02 | 15.02.0.0 → < 15.02.1544.050 | 15.02.1544.050 |
| Microsoft Exchange Server 2019 Cumulative Update 15 15.02 | 15.02.0.0 → < 15.02.1748.055 | 15.02.1748.055 |
| Microsoft Exchange Server Subscription Edition RTM 15.02 | 15.02.0.0 → < 15.02.2562.056 | 15.02.2562.056 |
References
- Microsoft Exchange Server Elevation of Privilege Vulnerability msrc.microsoft.com
Timeline
- Published
- Last modified
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9.3
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7.8
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7.8
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8.1
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