Ref# ADV2025_338 | Date: Sep 27th 2025

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Microsoft Edge published a security advisory highlighting vulnerabilities in the following product on September 25^th, 2025. It is recommended that you take the necessary precautions by ensuring your product is always updated.

• Microsoft Edge Stable Channel – versions prior to 140.0.3485.94

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 Security Advisories. (September 25th, 2025). Retrieved from Microsoft Edge. https://learn.microsoft.com/en-us/DeployEdge/microsoft-edge-relnotes-security#september-25-2025
• Microsoft Edge Security Advisory. (September 26th, 2025). Retrieved from Canadian Centre for Cyber Security. https://www.cyber.gc.ca/en/alerts-advisories/microsoft-edge-security-advisory-av25-621