CVE-2026-55050 Details
Description
Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to disclose information locally.
A vulnerability allowing out-of-bounds read has been identified in Microsoft Office Word. This issue could enable an unauthorized attacker to locally disclose information by reading small portions of heap memory. The vulnerability arises when a user is convinced to open a malicious Office file, as user interaction is required for exploitation.
Users can apply the security update available through the Microsoft Update Catalog. Instructions for downloading this update can be found in the Microsoft Office Update Guidance.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jul 16, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55050 | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-125 | Out-of-bounds Read | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| microsoft 365 apps | All versions |
CPE
Remediation
| |
| microsoft microsoft 365 | All versions |
CPE
Remediation
| |
| microsoft office 2019 | All versions |
CPE
Remediation
| |
| microsoft office 2021 | < 16.111.26071215 |
CPE
Remediation
| |
| microsoft office 2024 | < 16.111.26071215 |
CPE
Remediation
| |
| microsoft office online server | < 16.0.10417.20175 |
CPE
Remediation
| |
| microsoft sharepoint server | < 16.0.19725.20434 2016 2019 |
CPE
Remediation
| |
| microsoft word | 2016 |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 16, 2026 | CVE Modified | CISA-ADP |
| Jul 16, 2026 | Initial Analysis | [email protected] |
| Jul 14, 2026 | New CVE Received | [email protected] |