CVE-2026-42827

medium Microsoft
CVSS v3 Base Score
6.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
EPSS Score
0.1%
Exploitation probability in 30 days
Top 81% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Confidentiality
High
Integrity
None
Availability
None
Published: May 22, 2026 (48 days ago)
Last Modified: May 27, 2026
Vendor: Microsoft
Source: NVD

Description

Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an unauthorized attacker to disclose information over a network.

CWE

CWE-77

Affected Products

microsoft 365 copilot

References

🔗 msrc.microsoft.com