Microsoft has released security updates to address vulnerabilities in its software products, including zero-day vulnerability CVE-2025-29824.

These updates apply to, but are not limited to:

• Windows OS: 10 and 11.

• Windows Server: 2016, 2019, 2022, 2025.

• Microsoft Office: 2016, 2019, and Microsoft Edge.

Security Risks

The identified vulnerabilities could allow authenticated attackers to gain remote access, execute malicious code with elevated privileges and compromise system integrity and security.

For the full list of security patches released by Microsoft, please refer to Microsoft Security Update Guide.

 Recommended Actions

The National Cyber Security Authority (NCSA) recommends users and administrators:

1. Apply the latest security patches, as soon as possible, to prevent unauthorized control over unpatched systems.

2. Upgrade immediately to the latest supported version of installed Microsoft software in order to continue receiving technical support and security patches.

The following Microsoft software products reached their end-of-life and need to be upgraded immediately:

• Windows Vista, XP, 8 and 7

• Windows Server 2003, 2003 RE, 2008, 2008 RE, 2008 SP2, 2012 and 2012 R2

• Exchange Server 2003, 2007, 2010, 2013

• Microsoft SQL Server 2005, 2008, 2012

• Microsoft Office 2013

Additionally, the following will reach their end-of-life in October 2025 and should be upgraded soon:

• Windows 10

• Microsoft Office 2016 and 2019

• Microsoft Exchange Server 2016 and 2019

3. Before any updating task, ensure you have a current tested backup of your data.

For further information and support, please contact the National Cyber Security Authority (NCSA) by emailing rwcsirt@ncsa.gov.rw or calling us on 9009.

References

• Microsoft April 2025 Security Release Notes.

• Microsoft Ending Support in 2025.