VulnerabilityAnalyzed
CVE-2026-58617
Improper access control in Microsoft 365 Copilot for iOS allows an unauthorized attacker to elevate privileges over a network.
CRITICAL 9.8EPSS 0.79%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.79%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Improper access control in Microsoft 365 Copilot for iOS allows an unauthorized attacker to elevate privileges over a network.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.79% probability · 54th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-284
- Affected
- microsoft/365 copilot
- Source
- secure@microsoft.com
References
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.