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CVE-2026-66314— Microsoft Edge (Chromium-based) Information Disclosure Vulnerability

Quick assessment

Affected
Microsoft Microsoft Edge (Chromium-based)
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Microsoft Edge是美国Microsoft公司的一款Windows10附带的Web浏览器。 Microsoft Edge 151.0.4129.59之前版本存在竞争条件问题漏洞，该漏洞源于检查时间与使用时间竞争条件，可能导致未经授权的攻击者通过网络泄露信息。

CVSS 6.5 · Medium EPSS 0.57% · P45

Possible ATT&CK Techniques 1 AI

T1205.002 · Socket Filters

Affected Version Matrix 1

VendorProduct Version RangeStatus
Microsoft Microsoft Edge (Chromium-based) 1.0.0.0< 151.0.4129.59 affected
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I. Basic Information for CVE-2026-66314

Vulnerability Information
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Vulnerability Title
Microsoft Edge (Chromium-based) Information Disclosure Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Time-of-check time-of-use (toctou) race condition in Microsoft Edge (Chromium-based) allows an unauthorized attacker to disclose information over a network.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
检查时间与使用时间(TOCTOU)的竞争条件
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft Edge 竞争条件问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Edge是美国Microsoft公司的一款Windows10附带的Web浏览器。 Microsoft Edge 151.0.4129.59之前版本存在竞争条件问题漏洞，该漏洞源于检查时间与使用时间竞争条件，可能导致未经授权的攻击者通过网络泄露信息。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Microsoft Microsoft Edge (Chromium-based) 1.0.0.0 ~ 151.0.4129.59 -

II. Public POCs for CVE-2026-66314

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III. Intelligence Information for CVE-2026-66314

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Vendor Advisories for CVE-2026-66314 (1)

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

CVE-2026-62870 8.8 HIGH Microsoft Excel Remote Code Execution Vulnerability
CVE-2026-66318 8.1 HIGH Microsoft Edge (Chromium-based) Information Disclosure Vulnerability
CVE-2026-66310 7.7 HIGH Microsoft Edge for Android Information Disclosure Vulnerability
CVE-2026-66315 7.5 HIGH Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
CVE-2026-65802 7.4 HIGH Microsoft Edge for Android Information Disclosure Vulnerability
CVE-2026-66321 7.4 HIGH Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
CVE-2026-66322 7.1 HIGH Microsoft Edge (Chromium-based) Spoofing Vulnerability
CVE-2026-66313 6.8 MEDIUM Microsoft Edge (Chromium-based) Tampering Vulnerability
CVE-2026-66326 6.5 MEDIUM Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
CVE-2026-66312 6.5 MEDIUM Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
CVE-2026-66311 6.2 MEDIUM Microsoft Edge (Chromium-based) Tampering Vulnerability
CVE-2026-66325 6.1 MEDIUM Microsoft Edge (Chromium-based) Spoofing Vulnerability
CVE-2026-65804 6.1 MEDIUM Microsoft Edge (Chromium-based) Spoofing Vulnerability
CVE-2026-66317 5.4 MEDIUM Microsoft Edge (Chromium-based) Tampering Vulnerability
CVE-2026-66316 5.4 MEDIUM Microsoft Edge (Chromium-based) Spoofing Vulnerability

IV. Related Vulnerabilities

Same product: Microsoft Edge (Chromium-based)
Same vendor: Microsoft
Same weakness: CWE-367

V. Comments for CVE-2026-66314

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