PT-2026-4307 · Microsoft · Copilot Studio

Published 2026-01-22 · Updated 2026-04-18 · CVE-2026-21520

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

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

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

Description An unauthenticated attacker can view sensitive information through a network attack vector. The issue involves the exposure of sensitive information to an unauthorized actor.

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:2026-00838

CVE-2026-21520

Affected Products

Copilot Studio

References · 18

• https://nvd.nist.gov/vuln/detail/CVE-2026-21520 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21520 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-00838 · Security Note
• https://t.me/securixy_kz/1313 · Telegram Post
• https://twitter.com/asteris_ai/status/2044781133154414780 · Twitter Post
• https://twitter.com/AmanKum24351731/status/2044764913651060908 · Twitter Post
• https://t.me/msrcreports/3009 · Telegram Post
• https://twitter.com/rajeshberi/status/2045292189316771959 · Twitter Post
• https://twitter.com/GenAISpotlight/status/2044780728982835697 · Twitter Post
• https://twitter.com/rajeshberi/status/2045292323857400141 · Twitter Post
• https://t.me/cveNotify/150557 · Telegram Post
• https://twitter.com/next_coretech/status/2044613185676710338 · Twitter Post
• https://twitter.com/CVEnew/status/2014576999713669591 · Twitter Post
• https://twitter.com/rajeshberi/status/2045292241342832990 · Twitter Post
• https://twitter.com/rajeshberi/status/2045292217187881132 · Twitter Post