CVE-2026-55946: Improper neutralization of special elements used in a command ('command injection') in Microsoft Copilot allows an unaut
Summary
Microsoft Copilot has a command injection vulnerability (a flaw where special characters in user input are not properly filtered, allowing attackers to execute unintended commands), which lets an unauthorized attacker access and leak sensitive information over a network.
Vulnerability Details
6.1(medium)
EPSS: 0.0%
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N
network
high
none
required
September 17, 2026
Classification
Affected Vendors
Related Issues
Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-55946
First tracked: September 17, 2026 at 08:07 PM
Classified by LLM (prompt v3) · confidence: 85%