Summary
Impact: Remote Code Execution. Microsoft rating: Important. Not known to be exploited — Exploitation Unlikely. Customer action: Required.
Details
How could an attacker exploit this vulnerability?
An attacker who already has the ability to execute JavaScript in the affected Microsoft Edge process could trigger the vulnerability through specially crafted activity. Successful exploitation could allow the attacker to execute code beyond the browser's security scope.
According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?
To successfully exploit this vulnerability, an attacker would need existing ability to execute Javascript in the impacted process.
What is the version information for this release?
152.0.4191.53: 152.0.4191.53, 08/28/2026: 08/28/2026, 152.0.7977.64/.65: 152.0.7977.64/.65
Security updates
152.0.4191.52 — https://learn.microsoft.com/en-us/DeployEdge/microsoft-edge-relnotes-security
Vulnerabilities 1
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High 8.5
Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
Use after free in Microsoft Edge (Chromium-based) allows an authorized attacker to execute code over a network.
Revision history
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#1
Information published.
References
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CVE-2026-70341 Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70341
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Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
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Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
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Common Vulnerability Scoring System
https://www.first.org/cvss