Ref# ADV2025_282 | Date: Aug 20th 2025

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Microsoft Edge has published a security advisory highlighting vulnerabilities in the following products on August 15th, 2025. It is recommended that you take the necessary precautions by ensuring your products are always updated. 

• Microsoft Edge Stable Channel – versions prior to 139.0.3405.102 

• Microsoft Extended Edge Stable Channel – versions prior to 138.0.3351.140 

For more information on these updates, you can follow this URL: 

Microsoft Edge Stable Channel Release Notes 

The Guyana National CIRT recommends that users and administrators review these updates and apply them where necessary. 

PDF Download: Microsoft Edge Security Advisory

References 

• Microsoft Edge Stable Channel Release Notes. (August 15th, 2025). Retrieved from Microsoft. https://learn.microsoft.com/en-us/DeployEdge/microsoft-edge-relnotes-security#august-15-2025  

• Microsoft Edge Security Advisory. (August 18th, 2025). Retrieved from Canadian Centre for Cyber Security. https://www.cyber.gc.ca/en/alerts-advisories/microsoft-edge-security-advisory-av25-526