CVE-2026-55142: Microsoft Word Information Disclosure…

Record summary

CVE-2026-55142 has a selected CVSS score of 5.5 (medium).

Numeric truncation error in Microsoft Office Word allows an unauthorized attacker to disclose information locally.

Description source: GitHub Advisory

ExploitationNone

AutomatableNo

Technical impactPartial

CISA Coordinator · SSVC 2.0.3 · Evaluated Jul 14, 2026 · Source: CVE List

Product	Source	Version range	Status
Microsoft 365 Apps for Enterprise Browse Microsoft / Microsoft 365 Apps for Enterprise	CVE List	16.0.1 to < https://aka.ms/OfficeSecurityReleases	affected
Microsoft Office 2019 Browse Microsoft / Microsoft Office 2019	CVE List	19.0.0 to < https://aka.ms/OfficeSecurityReleases	affected
Microsoft Office 365 for Mac Browse Microsoft / Microsoft Office 365 for Mac	CVE List	1.0.0 to < 16.111.26071215	affected
Microsoft Office LTSC 2021 Browse Microsoft / Microsoft Office LTSC 2021	CVE List	16.0.1 to < https://aka.ms/OfficeSecurityReleases	affected
Microsoft Office LTSC 2024 Browse Microsoft / Microsoft Office LTSC 2024	CVE List	16.0.0 to < https://aka.ms/OfficeSecurityReleases	affected
Microsoft SharePoint Enterprise Server 2016 Browse Microsoft / Microsoft SharePoint Enterprise Server 2016	CVE List	16.0.0 to < 16.0.5561.1001	affected
Microsoft SharePoint Server 2019 Browse Microsoft / Microsoft SharePoint Server 2019	CVE List	16.0.0 to < 16.0.10417.20175	affected
Microsoft SharePoint Server Subscription Edition Browse Microsoft / Microsoft SharePoint Server Subscription Edition	CVE List	16.0.0 to < 16.0.19725.20434	affected
Microsoft Word 2016 Browse Microsoft / Microsoft Word 2016	CVE List	16.0.1 to < 16.0.5561.1000	affected

Microsoft Word Information Disclosure VulnerabilityVendor advisorypatch

nvd.nist.gov

https://nvd.nist.gov/vuln/detail/CVE-2026-55142