Description
Improper neutralization of special elements used in a command ('command injection') in Microsoft Copilot allows an unauthorized attacker to perform tampering over a network.
References (1)
Core 1
Core References
Vendor Advisory vendor-advisory
patch
Microsoft Copilot Tampering Vulnerability
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41090
Scores
CVSS v3
9.3
EPSS
0.0042
EPSS Percentile
34.0%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-77
Status
published
Products (2)
microsoft/365_copilot
Microsoft/Microsoft 365 Copilot for iOS
-
Published
May 22, 2026
Tracked Since
May 23, 2026