PT-2026-40239 · Microsoft · M365 Copilot

Published 2026-05-12 · Updated 2026-06-03 · CVE-2026-41100

Positive Technologies (AI Summary)

CVSS v3.1

4.4

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions Microsoft 365 Copilot for Android (affected versions not specified)

Description Improper access control in the intelligent virtual assistant allows an authorized attacker to perform spoofing attacks locally. Spoofing is a technique where a person or program successfully masquerades as another by falsifying data.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Improper Access Control

Weakness Enumeration

CWE-284

Related Identifiers

BDU:2026-06787

CVE-2026-41100

Affected Products

M365 Copilot

References · 5

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41100 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-06787 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-41100 · Security Note
• https://twitter.com/CyberDhaal/status/2062108294743728297 · Twitter Post
• https://t.me/cveNotify/163716 · Telegram Post