What is CVE-2026-58617?

CVE-2026-58617 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. M365 Copilot for iOS Elevation of Privilege Vulnerability

Which CVE IDs does CVE-2026-58617 cover?

CVE-2026-58617 covers the following CVE IDs: CVE-2026-58617. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-58617?

CVE-2026-58617 has a CVSS v3 base score of 8.1, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-58617?

CVE-2026-58617 affects 1 product, including: Microsoft 365 Copilot for iOS.

CVE-2026-58617HighCVSS 8.1

M365 Copilot for iOS Elevation of Privilege Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

July 17, 2026

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2026-58617 →

📋 Description

Improper access control in Microsoft 365 Copilot for iOS allows an unauthorized attacker to elevate privileges over a network.

🎯 Affected products1

Microsoft 365 Copilot for iOS

✅ Remediation

KBRelease Notes (Security Update) — fixed build 2.111.4

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58617
patchhttps://apps.apple.com/us/app/microsoft-365-copilot/id541164041