CVE-2026-108443
highpriority · track · 35EPSS 0.004 · 37 %ileDEFRUSEPSS · scored 2026-10-23
Off-by-one error in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
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://learn.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates
https://learn.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://learn.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates
https://learn.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates - FixedMicrosoft Office 365 for Macmsrc_csaf
16.114.26101123:Security Update:https://learn.microsoft.com/en-us/officeupdates/release-notes-office-for-mac
https://learn.microsoft.com/en-us/officeupdates/release-notes-office-for-mac - FixedMicrosoft Office LTSC 2021 for 32-bit editionsmsrc_csaf
16.0.14334.20974: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
16.0.14334.20974: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
16.0.17932.21056: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
16.0.17932.21056: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
16.114.26101123:Security Update:https://learn.microsoft.com/en-us/officeupdates/release-notes-office-for-mac
https://learn.microsoft.com/en-us/officeupdates/release-notes-office-for-mac - FixedMicrosoft Office LTSC for Mac 2024msrc_csaf
16.114.26101123:Security Update:https://learn.microsoft.com/en-us/officeupdates/release-notes-office-for-mac
https://learn.microsoft.com/en-us/officeupdates/release-notes-office-for-mac
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 (39)
Products and version ranges known to be affected.
- Microsoft Microsoft Office LTSC 2021all versionscert_bundDEcpe:/a:microsoft:microsoft_office_ltsc_2021:-
- Microsoft Microsoft Office LTSC 2024all versionscert_bundDEcpe:/a:microsoft:microsoft_office_ltsc_2024:-
- 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 Skype for Business Server 2015 CU13all versionscert_bundDEcpe:/a:microsoft:skype:for_business_server_2015_cu13
- Microsoft Skype for Business Server 2019 CU8all versionscert_bundDEcpe:/a:microsoft:skype:for_business_server_2019_cu8
- Microsoft Skype for Business Server Subscription Edition CU1all versionscert_bundDEcpe:/a:microsoft:skype:for_business_server_subscription_edition_cu1
- Microsoft Microsoft 365 Apps for Enterprise for 32-bit Systems< https://aka.ms/OfficeSecurityReleasesmsrc_csafUS
advisories (3)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2026-3916Microsoft Office Produkte: Mehrere Schwachstellen ermöglichen PrivilegieneskalationDeutsch2026-10-13csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in verschiedenen Microsoft Office Produkten ausnutzen, um seine Privilegien zu erhöhen, um Code auszuführen, um Informationen offenzulegen oder zu manipulieren und um Sicherheitsmechanismen zu umgehen.
- msrc_CVE-2026-108443Microsoft Office Word Remote Code Execution Vulnerability2026-10-15csaf · msrc_csafUS
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle
- CERTFR-2026-AVI-1331Multiples vulnérabilités dans Microsoft OfficeFrançais2026-10-16vendor · certfrFR
sources
Which sources assert this record, and when.
references (1) nvd
External citations — patches, advisories, analysis.
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