P4Verified

CVE-2026-78501: 365 copilot chat Version not applicable in the source CPE; +1 more affected products

CVE-2026-78501. CVSS 3.1 base score 8.6 (HIGH, NVD). EPSS 0.00893 (percentile 0.58139), scored 2026-10-06.

Affected technology

365 copilot chat · Version not applicable in the source CPE
microsoft

Microsoft 365 Copilot's Business Chat · -
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 disclose information over a network. Vendor/CNA’s CVSS 3.1 assessment (base score 7.4/10) rates confidentiality impact as high; integrity and availability impact as none. NVD’s CVSS 3.1 assessment (base score 8.6/10) rates confidentiality impact as high; integrity and availability impact as none.

Published 2026-10-07 15:14:35.495550+00:00

CWE: CWE-77, CWE-923
CCR priority: 34.6 /100 (P4)
CVSS 3.1: 8.6 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N · NVD
EPSS: 0.00893 · percentile 0.58139 · 2026-10-06
KEV: no

Provenance

NVD CVE API 2.0 · Source record · observed 2026-10-07 15:14:18.222433+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-78501.html