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CVE-2026-66311— Microsoft Edge (Chromium-based) Tampering Vulnerability

CVSS 6.2 · Medium

Possible ATT&CK Techniques 1AI

T1055 · Process Injection
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I. Basic Information for CVE-2026-66311

Vulnerability Information
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Vulnerability Title
Microsoft Edge (Chromium-based) Tampering Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Missing authorization in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform tampering locally.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5

Affected Products

VendorProductAffected VersionsCPESubscribe
MicrosoftMicrosoft Edge (Chromium-based) 1.0.0.0 ~ 151.0.4129.59 -

II. Public POCs for CVE-2026-66311

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III. Intelligence Information for CVE-2026-66311

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Vendor Advisories for CVE-2026-66311 (1)

Same Patch Batch · Microsoft · 2026-08-03 · 16 CVEs total

CVE-2026-628708.8 HIGHMicrosoft Excel Remote Code Execution Vulnerability
CVE-2026-663188.1 HIGHMicrosoft Edge (Chromium-based) Information Disclosure Vulnerability
CVE-2026-663107.7 HIGHMicrosoft Edge for Android Information Disclosure Vulnerability
CVE-2026-663157.5 HIGHMicrosoft Edge (Chromium-based) Remote Code Execution Vulnerability
CVE-2026-658027.4 HIGHMicrosoft Edge for Android Information Disclosure Vulnerability
CVE-2026-663217.4 HIGHMicrosoft Edge (Chromium-based) Remote Code Execution Vulnerability
CVE-2026-663227.1 HIGHMicrosoft Edge (Chromium-based) Spoofing Vulnerability
CVE-2026-663136.8 MEDIUMMicrosoft Edge (Chromium-based) Tampering Vulnerability
CVE-2026-663266.5 MEDIUMMicrosoft Edge (Chromium-based) Remote Code Execution Vulnerability
CVE-2026-663146.5 MEDIUMMicrosoft Edge (Chromium-based) Information Disclosure Vulnerability
CVE-2026-663126.5 MEDIUMMicrosoft Edge (Chromium-based) Remote Code Execution Vulnerability
CVE-2026-663256.1 MEDIUMMicrosoft Edge (Chromium-based) Spoofing Vulnerability
CVE-2026-658046.1 MEDIUMMicrosoft Edge (Chromium-based) Spoofing Vulnerability
CVE-2026-663175.4 MEDIUMMicrosoft Edge (Chromium-based) Tampering Vulnerability
CVE-2026-663165.4 MEDIUMMicrosoft Edge (Chromium-based) Spoofing Vulnerability

IV. Related Vulnerabilities

Same product: Microsoft Edge (Chromium-based)
Same vendor: Microsoft
Same weakness: CWE-862

V. Comments for CVE-2026-66311

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