What is CVE-2026-87692?

CVE-2026-87692 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. Microsoft Exchange Server Elevation of Privilege Vulnerability

Which CVE IDs does CVE-2026-87692 cover?

CVE-2026-87692 covers the following CVE IDs: CVE-2026-87692. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-87692?

CVE-2026-87692 has a CVSS v3 base score of 7.8, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-87692?

CVE-2026-87692 affects 3 products, including: Microsoft Exchange Server 2016 Cumulative Update 23; Microsoft Exchange Server 2019 Cumulative Update 14; Microsoft Exchange Server Subscription Edition RTM.

CVE-2026-87692HighCVSS 7.8

Microsoft Exchange Server Elevation of Privilege Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

October 13, 2026

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2026-87692 →

📋 Description

Deserialization of untrusted data in Microsoft Exchange Server allows an authorized attacker to elevate privileges locally.

🎯 Affected products3

Microsoft Exchange Server 2016 Cumulative Update 23
Microsoft Exchange Server 2019 Cumulative Update 14
Microsoft Exchange Server Subscription Edition RTM

✅ Remediation

KB5128898 (Security Update) — fixed build 15.01.2507.077 KB5128897 (Security Update) — fixed build 15.02.1544.050 KB5128895 (Security Update) — fixed build 15.02.2562.056

🔗 References (5)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-87692
referencehttps://support.microsoft.com/help/5128898
referencehttps://support.microsoft.com/help/5128897
patchhttps://www.microsoft.com/en-us/download/details.aspx?id=108875
referencehttps://support.microsoft.com/help/5128895