U.S. flag   An official website of the United States government
Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock (Dot gov) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database

Vulnerability Change Records for CVE-2026-55128

Change History

New CVE Received from Microsoft Corporation 7/14/2026 2:18:19 PM

Action Type Old Value New Value
Added Description 

                  
                
              		

              
                
                  
                  
                    
Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally.

                  
                
              		
            

            

              Added
              CVSS V3.1

              
                
                  
                  
                    

                  
                
              		

              
                
                  
                  
                    
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

                  
                
              		
            

            

              Added
              CWE

              
                
                  
                  
                    

                  
                
              		

              
                
                  
                  
                    
CWE-416

                  
                
              		
            

            

              Added
              Reference

              
                
                  
                  
                    

                  
                
              		

              
                
                  
                  
                    
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55128

                  
                
              		
            

            

              Added
              Affected

              
                
                  
                  
                    

                  
                
              		

              
                
                  
                  
                    
[{"vendor":"Microsoft","product":"Microsoft 365 Apps for Enterprise","platforms":["32-bit Systems","x64-based Systems"],"versions":[{"version":"16.0.1","lessThan":"https://aka.ms/OfficeSecurityReleases","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Office 2019","platforms":["32-bit Systems","x64-based Systems"],"versions":[{"version":"19.0.0","lessThan":"https://aka.ms/OfficeSecurityReleases","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Office 365 for Mac","versions":[{"version":"1.0.0","lessThan":"16.111.26071215","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Office LTSC 2021","platforms":["32-bit Systems","x64-based Systems"],"versions":[{"version":"16.0.1","lessThan":"https://aka.ms/OfficeSecurityReleases","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Office LTSC 2024","platforms":["32-bit Systems","x64-based Systems"],"versions":[{"version":"16.0.0","lessThan":"https://aka.ms/OfficeSecurityReleases","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Office LTSC for Mac 2021","versions":[{"version":"16.0.1","lessThan":"16.111.26071215","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Office LTSC for Mac 2024","versions":[{"version":"16.0.0","lessThan":"16.111.26071215","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft SharePoint Enterprise Server 2016","platforms":["x64-based Systems"],"versions":[{"version":"16.0.0","lessThan":"16.0.5561.1001","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft SharePoint Server 2019","platforms":["x64-based Systems"],"versions":[{"version":"16.0.0","lessThan":"16.0.10417.20175","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft SharePoint Server Subscription Edition","platforms":["x64-based Systems"],"versions":[{"version":"16.0.0","lessThan":"16.0.19725.20434","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Word 2016","platforms":["32-bit Systems","x64-based Systems"],"versions":[{"version":"16.0.1","lessThan":"16.0.5561.1000","versionType":"custom","status":"affected"}]}]