PT-2026-40261 · Microsoft · M365 Copilot

Published 2026-05-12 · Updated 2026-05-12 · CVE-2026-42893

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:C/A:N

Name of the Vulnerable Software and Affected Versions M365 Copilot (affected versions not specified)

Description Improper neutralization of special elements used in a command, known as command injection, allows an unauthorized attacker to perform tampering over a network.

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

Command Injection

Weakness Enumeration

CWE-77

Related Identifiers

BDU:2026-06780

CVE-2026-42893

Affected Products

M365 Copilot

References · 7

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42893 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-42893 · Security Note
• https://bdu.fstec.ru/vul/2026-06780 · Security Note
• https://twitter.com/CVEnew/status/2054341001871868407 · Twitter Post
• https://feedly.com/cve/CVE-2026-42893 · Note
• https://twitter.com/infoflowcloud/status/2054342373585408117 · Twitter Post
• https://t.me/CVEtracker/53527 · Telegram Post