Improper access control in Microsoft 365 Copilot for iOS - CVE-2026-58617
Published: July 15, 2026
Vulnerability identifier: #VU137775
CSH Severity: High
CVSS v4: 8.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-58617
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to improper access restrictions in M365 Copilot for iOS. A remote attacker can bypass implemented security restrictions and gain elevated privileges on the system.
Affected software
Microsoft 365 Copilot for iOS
How to mitigate CVE-2026-58617
Install updates from vendor's website.
Microsoft 365 Copilot for iOS - update to 2.111.4