What is CVE-2026-58617?

CVE-2026-58617 is a high-severity vulnerability in Microsoft 365 Copilot For Ios, classified under Improper Access Control. CVSS score: 8.1/10. Published 2026-07-14.

How severe is CVE-2026-58617?

High severity. CVSS v3 base score is 8.1 out of 10.

Vulnerability in Microsoft 365 Copilot For Ios

CVE-2026-58617

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

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N.

Affected products

Microsoft 365 Copilot For Ios — versions 1.0

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

secure@microsoft.com (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-58617?: CVE-2026-58617 is a high-severity vulnerability in Microsoft 365 Copilot For Ios, classified under Improper Access Control. CVSS score: 8.1/10. Published 2026-07-14.
How severe is CVE-2026-58617?: High severity. CVSS v3 base score is 8.1 out of 10.