CVE-2026-58617: 365 copilot before 2.111.4 (exclusive); +1 more affected products

CVE-2026-58617. CVSS 3.1 base score 9.8 (CRITICAL, NVD). EPSS 0.00787 (percentile 0.55745), scored 24-Oct-2026.

Affected technology

365 copilot · before 2.111.4 (exclusive)
microsoft

Microsoft 365 Copilot for iOS · 1.0 to before 2.111.4
Microsoft

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 3.1): Network (remote) · No privileges required · User interaction required

Attack conditions (NVD, CVSS 3.1): Network (remote) · No privileges required · No user interaction required

What an attacker can do

An unauthorized attacker can elevate privileges over a network. Vendor/CNA’s CVSS 3.1 assessment (base score 8.1/10) rates confidentiality and integrity impact as high; availability impact as none. NVD’s CVSS 3.1 assessment (base score 9.8/10) rates confidentiality, integrity and availability impact as high.

Published 25-Oct-2026 01:29 UTC

CWE: CWE-284
CCR priority: 39.4 /100 (P4)
CVSS 3.1: 9.8 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H · NVD
EPSS: 0.00787 · percentile 0.55745 · 2026-10-24
KEV: no

Provenance

NVD CVE API 2.0 · Source record · observed 2026-10-25 01:28:19.133527+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-58617.html