CVE-2026-87692
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Privilege Escalation via Deserialization in Microsoft Exchange Server
Vulnerability report for CVE-2026-87692, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-10-13
Last updated on: 2026-10-13
Assigner: Microsoft Corporation
Description
Description
Deserialization of untrusted data in Microsoft Exchange Server allows an authorized attacker to elevate privileges locally.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| Microsoft | Microsoft | Exchange Server 2016 Cumulative Update 23 15.01.0.0 |
| Microsoft | Microsoft | Exchange Server 2019 Cumulative Update 14 15.02.0.0 |
| Microsoft | Microsoft | Exchange Server Subscription Edition RTM 15.02.0.0 |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-502 | The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid. |
