PT-2026-4313 · Microsoft · M365 Copilot

Es7Evam + 1 · Published 2026-01-22 · Updated 2026-03-11 · CVE-2026-24307

Positive Technologies (AI Summary)

CVSS v2.0

9.4

Critical

Base vector

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

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

Description An improper validation of a specified input type in M365 Copilot can allow an unauthorized attacker to disclose information over a network.

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

Weakness Enumeration

CWE-1287

Related Identifiers

BDU:2026-00836

CVE-2026-24307

Affected Products

M365 Copilot

References · 20

• https://nvd.nist.gov/vuln/detail/CVE-2026-24307 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-24307 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-00836 · Security Note
• https://twitter.com/Samueljgrim/status/2018227496395628874 · Twitter Post
• https://t.me/defcon_news/134400 · Telegram Post
• https://twitter.com/tobepeaked/status/2031740213257748897 · Twitter Post
• https://t.me/msrcreports/3004 · Telegram Post
• https://twitter.com/grok/status/2018226902478061961 · Twitter Post
• https://twitter.com/0dayPublishing/status/2014702468760789204 · Twitter Post
• https://twitter.com/_r_netsec/status/2031735165278707718 · Twitter Post
• https://twitter.com/CveFindCom/status/2014483014760239483 · Twitter Post
• https://twitter.com/grok/status/2018227635868860538 · Twitter Post
• https://t.me/RNetsec/22713 · Telegram Post
• https://twitter.com/es7evam/status/2014760101098488238 · Twitter Post
• https://twitter.com/CVEnew/status/2014576996282671580 · Twitter Post