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Microsoft Security Response CenterCVE-2026-42893

Microsoft Outlook for iOS Tampering Vulnerability

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

Read the vendor bulletin Get alerts for Microsoft Outlook for iOS
7.4CVSS out of 10High severity
Scope

What the vendor says is affected

  • Microsoft Outlook for iOS

Versions the vendor lists as fixed

  • 5.2617.1
Next step

What the vendor recommends

See the Microsoft Security Update Guide for the update that applies to your product.

Review the complete instructions on the vendor's site
Timeline

When this advisory changed

  1. Published by Microsoft Security Response Center

    The publication date reported by the vendor.

  2. Added to SecurityAlert

    We collected the advisory from the official source.

Vulnerabilities

CVEs named in this advisory

CVE-2026-42893View CVSS, KEV, EPSS, and threat context
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