CVE-2026-55127: Microsoft Word Remote Code Execution Vulnerability
Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code locally.
Other sources
Microsoft Word Remote Code Execution Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.5561.1000Patch KB5002890 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.111.26071215 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in https://aka.ms/OfficeSecurityReleases - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.19725.20434Patch KB5002882 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.5561.1001Patch KB5002892 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.10417.20175Patch KB5002885
Event History
Frequently Asked Questions
What is the severity of CVE-2026-55127?
CVE-2026-55127 has a severity rating of 7.8, categorized as high.
How do I fix CVE-2026-55127?
To fix CVE-2026-55127, apply the latest security updates provided by Microsoft for affected products.
What systems are affected by CVE-2026-55127?
CVE-2026-55127 affects Microsoft SharePoint Server, Microsoft Word 2016, Microsoft 365 Apps for Enterprise, Microsoft Office 2019, Microsoft Office 2021, and Microsoft Office 2024.
What type of vulnerability is CVE-2026-55127?
CVE-2026-55127 is a heap-based buffer overflow vulnerability.
What type of attack does CVE-2026-55127 enable?
CVE-2026-55127 allows unauthorized attackers to execute code locally on affected systems.