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Findings

CVE-2026-87695

Affected Microsoft products: Microsoft Exchange Server 2019 Cumulative Update 14, Microsoft Exchange Server Subscription Edition RTM, Microsoft Exchange Server 2016 Cu…

Published Oct 13, 2026 · corrected/updated Oct 13, 2026 · Microsoft Exchange · evidence confidence high

Affected Microsoft products: Microsoft Exchange Server 2019 Cumulative Update 14, Microsoft Exchange Server Subscription Edition RTM, Microsoft Exchange Server 2016 Cumulative Update 23, Microsoft Exchange Server 2019 Cumulative Update 15.

Grounded briefings

Catalog interpretations for three audiences. Each brief cites ingested metadata and the original advisories below. They are not independent research and they do not invent exploit steps.

Executive

CVE-2026-87695 is a high public vulnerability record for Microsoft Exchange. It is not currently listed in the CISA Known Exploited catalog. Check the linked vendor or CERT advisories for patch status. This summary is a catalog interpretation of the ingested metadata and cites the original advisories below.

System administrator

Identify whether Microsoft Exchange is in your estate, then compare installed versions with the affected ranges. Affected packages or ranges on record: 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. Check the linked vendor or CERT advisories for patch status. Prefer the vendor or distribution advisory linked in Sources before changing production systems. This is a catalog interpretation, not a runbook.

Security analyst

Signals on file: CVSS 7.8. It is not currently listed in the CISA Known Exploited catalog. Weakness classes: CWE-829. Sources contributing to this record: cve_org, msrc. Public exploit references, when present, are outbound links only and are not proof of active exploitation. This is a catalog interpretation of stored metadata.

Exploitation and remediation

  • Exploitation evidence

    Not listed as known exploited in CISA KEV. Not in the CISA KEV catalog.

  • Patch and remediation

    No required-action text is stored yet. Use the vendor or CERT links in Sources for patch availability.

  • Safe detection guidance

    Compare installed versions with the affected ranges below and verify the advisory from the original publisher. This site stores metadata and outbound links only; it does not ship exploit code or proof-of-concept payloads.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 13, 2026 · Microsoft Security Update Guide

    Detected

    Affected Microsoft products: Microsoft Exchange Server 2019 Cumulative Update 14, Microsoft Exchange Server Subscription Edition RTM, Microsoft Exchange Server 2016 Cumulative Update 23, Microsoft Exchange Server 2019 Cumulative Update 15.

Affected

  • microsoft Microsoft Exchange Server 2016 Cumulative Update 23version unspecified
  • microsoft Microsoft Exchange Server 2019 Cumulative Update 14version unspecified
  • microsoft Microsoft Exchange Server 2019 Cumulative Update 15version unspecified
  • microsoft Microsoft Exchange Server Subscription Edition RTMversion unspecified

Sources

  • CVE.orgVulnerability recordCVE-2026-87695

    Official CVE identifier

    cve.org
  • Microsoft Security Update GuideVendor advisoryCVE-2026-87695

    Microsoft Exchange Server 2019 Cumulative Update 14, Microsoft Exchange Server Subscription Edition RTM, Microsoft Exchange Server 2016 Cumulative Update 23, Microsoft Exchange Server 2019 Cumulative Update 15

    msrc.microsoft.com

References