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CVE-2026-70331— Microsoft Edge for iOS Spoofing 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.

在 Microsoft Edge for iOS 中，由于用于 LLM（大语言模型）提示词构建的输入未经充分净化，允许未授权攻击者通过网络执行欺骗（spoofing）攻击。

CVSS 5.4 · Medium

Possible ATT&CK Techniques 1 AI

T1056 · Input Capture

Affected Version Matrix 2

VendorProduct Version RangeStatus
Microsoft Microsoft Edge (Chromium-based) 1.0.0.0< 150.0.4078.50 affected
Microsoft Microsoft Edge for iOS 1.0.0.0< 150.0.4078.50 affected
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I. Basic Information for CVE-2026-70331

Vulnerability Information
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Vulnerability Title
Microsoft Edge for iOS Spoofing Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Improper neutralization of input used for llm prompting in Microsoft Edge for iOS allows an unauthorized attacker to perform spoofing 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:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1427
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Microsoft Microsoft Edge (Chromium-based) 1.0.0.0 ~ 150.0.4078.50 -
Microsoft Microsoft Edge for iOS 1.0.0.0 ~ 150.0.4078.50 -

II. Public POCs for CVE-2026-70331

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III. Intelligence Information for CVE-2026-70331

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Vendor Advisories for CVE-2026-70331 (1)

Same Patch Batch · Microsoft · 2026-08-28 · 8 CVEs total

CVE-2026-72984 8.8 HIGH Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
CVE-2026-66324 6.5 MEDIUM Microsoft Edge (Chromium-based) Spoofing Vulnerability
CVE-2026-70309 5.4 MEDIUM Microsoft Edge (Chromium-based) Security Feature Bypass Vulnerability
CVE-2026-66323 5.4 MEDIUM Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
CVE-2026-62904 5.4 MEDIUM Microsoft Edge (Chromium-based) Information Disclosure Vulnerability
CVE-2026-58616 4.4 MEDIUM Copilot Chat (Microsoft Edge) Information Disclosure Vulnerability
CVE-2026-66798 4.3 MEDIUM Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability

IV. Related Vulnerabilities

Same product: Microsoft Edge (Chromium-based)
Same vendor: Microsoft
Same weakness: CWE-1427

V. Comments for CVE-2026-70331

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