Ref# ADV2025_174 | Date: Jun 27th 2025

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Microsoft has published a security advisory highlighting vulnerabilities in the following product on June 26th, 2025. It is recommended that you take the necessary precautions by ensuring your products are always updated. 

• Microsoft Edge Stable Channel – versions prior to 138.0.3351.55 

For more information on this update, you can follow this URL: 

• Microsoft Edge Stable Channel Release Notes 

The Guyana National CIRT recommends that users and administrators review this update and apply it where necessary. 

PDF Download: Microsoft Edge Security Advisory

References 

• Microsoft Edge Stable Channel Release Notes. (June 26th, 2025). Retrieved from Microsoft. https://learn.microsoft.com/en-us/DeployEdge/microsoft-edge-relnotes-security#june-26-2025  

• Microsoft Edge Organization Security Advisory. (June 27th, 2025). Retrieved from Canadian Centre for Cyber Security. https://www.cyber.gc.ca/en/alerts-advisories/microsoft-edge-security-advisory-av25-378