CVE-2026-45475
highpriority · track · 0EPSS 0.005 · 39 %ileDEEUNLRUUSEPSS · scored 2026-10-27
Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
remediations
Vendor fix, mitigation, or workaround guidance, as published by each source.
A vendor fix is available.
- FixedMicrosoft 365 Apps for Enterprise for 32-bit Systemsmsrc_csaf
https://aka.ms/OfficeSecurityReleases:Security Update:https://docs.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates
https://docs.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates - FixedMicrosoft 365 Apps for Enterprise for 64-bit Systemsmsrc_csaf
https://aka.ms/OfficeSecurityReleases:Security Update:https://docs.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates
https://docs.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates - FixedMicrosoft Office 2016 (32-bit edition)msrc_csaf
16.0.5556.1005:Security Update:https://support.microsoft.com/help/5002878
https://support.microsoft.com/help/5002878 - FixedMicrosoft Office 2016 (64-bit edition)msrc_csaf
16.0.5556.1005:Security Update:https://support.microsoft.com/help/5002878
https://support.microsoft.com/help/5002878 - FixedMicrosoft Office 2019 for 32-bit editionsmsrc_csaf
https://aka.ms/OfficeSecurityReleases:Security Update:https://docs.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates
https://docs.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates - FixedMicrosoft Office 2019 for 64-bit editionsmsrc_csaf
https://aka.ms/OfficeSecurityReleases:Security Update:https://docs.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates
https://docs.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates - FixedMicrosoft Office 365 for Macmsrc_csaf
16.110.26061317:Security Update:https://www.microsoft.com/en-us/microsoft-365/mac/microsoft-365-for-mac?msockid=35f9adb0e74b61392038b90de6fe608c
https://www.microsoft.com/en-us/microsoft-365/mac/microsoft-365-for-mac?msockid=35f9adb0e74b61392038b90de6fe608c - FixedMicrosoft Office LTSC 2021 for 32-bit editionsmsrc_csaf
https://aka.ms/OfficeSecurityReleases:Security Update:https://docs.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates
https://docs.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates - FixedMicrosoft Office LTSC 2021 for 64-bit editionsmsrc_csaf
https://aka.ms/OfficeSecurityReleases:Security Update:https://docs.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates
https://docs.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates - FixedMicrosoft Office LTSC 2024 for 32-bit editionsmsrc_csaf
https://aka.ms/OfficeSecurityReleases:Security Update:https://docs.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates
https://docs.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates - FixedMicrosoft Office LTSC 2024 for 64-bit editionsmsrc_csaf
https://aka.ms/OfficeSecurityReleases:Security Update:https://docs.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates
https://docs.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates - FixedMicrosoft Office LTSC for Mac 2021msrc_csaf
16.110.26061317:Security Update:https://go.microsoft.com/fwlink/p/?linkid=831049
https://go.microsoft.com/fwlink/p/?linkid=831049 - FixedMicrosoft Office LTSC for Mac 2024msrc_csaf
16.110.26061317:Security Update:https://go.microsoft.com/fwlink/p/?linkid=831049
https://go.microsoft.com/fwlink/p/?linkid=831049 - FixedMicrosoft SharePoint Enterprise Server 2016msrc_csaf
16.0.5556.1005:Security Update:https://support.microsoft.com/help/5002880
https://support.microsoft.com/help/5002880 - FixedMicrosoft SharePoint Server 2019msrc_csaf
16.0.10417.20153:Security Update:https://support.microsoft.com/help/5002874
https://support.microsoft.com/help/5002874 - FixedMicrosoft SharePoint Server Subscription Editionmsrc_csaf
16.0.19725.20384:Security Update:https://support.microsoft.com/help/5002873
https://support.microsoft.com/help/5002873
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (106)
Products and version ranges known to be affected.
- Microsoft SharePoint Enterprise Server 2016all versionscert_bundDEcpe:/a:microsoft:sharepoint:enterprise_server_2016
- Microsoft SharePoint Server Subscription Editionall versionscert_bundDEcpe:/a:microsoft:sharepoint:server_subscription_edition
- Microsoft Microsoft 365 Apps for Enterprise16.0.1 → https://aka.ms/OfficeSecurityReleasesenisa_euvdEU
advisories (3)
Vendor and ecosystem advisories describing this.
- NCSC-2026-0182Kwetsbaarheden verholpen in Microsoft OfficeNL2026-06-09csaf · ncsc_nlNL
Microsoft heeft kwetsbaarheden verholpen in diverse Office producten als Sharepoint, Wordt, Project en Excel.
- WID-SEC-W-2026-1847Microsoft Office: Mehrere SchwachstellenDeutsch2026-06-09csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in verschiedenen Microsoft Office und SharePoint Produkten ausnutzen, um Administratorrechte zu erlangen, beliebigen Code auszuführen, Spoofing-Angriffe durchzuführen, Daten zu manipulieren oder vertrauliche Informationen offenzulegen.
- msrc_CVE-2026-45475Microsoft Office Remote Code Execution Vulnerability2026-06-09csaf · msrc_csafUS
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle
also known as (4)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (3)
External citations — patches, advisories, analysis.
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