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Findings

CVE-2026-77910

Affected Microsoft products: Microsoft Exchange Server 2016 Cumulative Update 23, Microsoft Exchange Server 2019 Cumulative Update 14, Microsoft Exchange Server 2019 C…

Published Oct 13, 2026 · updated Oct 13, 2026 · Microsoft Exchange

Affected Microsoft products: 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.

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

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-2026-77910

    Official CVE identifier

    cve.org
  • Microsoft Security Update GuideVendor advisoryCVE-2026-77910

    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

    msrc.microsoft.com

References