CVE-2026-58617

FAUCET Score

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

First published: Jul 14, 2026Last modified: Jul 14, 2026

Impacted Technologies

Vendor	Product	Version(s)	CPE
		< 2.111.4CPE matchmatch criteria	cpe:2.3:a:microsoft:365_copilot::::::iphone_os::*

CVSS Data

CVSS version used by this source: 3.1

8.1HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

NONE

Exploitability Score

2.8

Impact Score

5.2

CvssVersion

3.1

Exploit Intelligence

EPSS Score

0.74%

Probability of exploitation in next 30 days

EPSS Percentile

50.7%

Percentile rank of EPSS score among Peer Group

As of 2026-07-27

Model: v2026.06.15

This CVE's current EPSS score of 0.0074 is in the 33rd percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

microsoftpatch availablevia msrc

Product: Microsoft 365 Copilot for iOSFixed in: 2.111.4

View patch

Vendor Advisories (1)

microsoft2026-Jul/CVE-2026-58617Important

M365 Copilot for iOS Elevation of Privilege Vulnerability

Jul 14, 2026

References

msrc.microsoft.com / update-guide/vulnerability/CVE-2026-58617

Vendor Advisory