Heap-based buffer overflow in Microsoft Edge - CVE-2026-72970

Vulnerability details

The vulnerability allows a remote attacker to execute arbitrary code.

The vulnerability exists due to heap-based buffer overflow in Microsoft Edge (Chromium-based) when rendering an attacker-controlled webpage and activating autofill. A remote attacker can trick the victim into visiting a crafted webpage and performing the required gestures to execute arbitrary code.

User interaction is required: the victim must visit an attacker-controlled webpage and perform two tap gestures that cause autofill to activate.

Affected software

How to mitigate CVE-2026-72970

External References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2026-72970
• https://docs.microsoft.com/en-us/DeployEdge/microsoft-edge-relnotes-security

Related Security Bulletins

• Remote code execution in Microsoft Edge