What is CVE-2026-42893?

CVE-2026-42893 is a security advisory published by Microsoft Security Response Center (MSRC) with Tampering severity. Microsoft Outlook for iOS Tampering Vulnerability

Which CVE IDs does CVE-2026-42893 cover?

CVE-2026-42893 covers the following CVE IDs: CVE-2026-42893. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-42893?

CVE-2026-42893 has a CVSS v3 base score of 7.4, published by Microsoft Security Response Center (MSRC).

CVE-2026-42893TamperingCVSS 7.4

Microsoft Outlook for iOS Tampering Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

May 22, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-42893 →

📋 Description

<p>Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an unauthorized attacker to perform tampering over a network.</p>