CVE-2026-55946
Microsoft Copilot Information Disclosure vulnerability
MSRC advisory September 17, 2026
Alert details
- Source feed
- Microsoft MSRC
- CVE ID
- CVE-2026-55946
- Affected products
- Microsoft Copilot Information Disclosure · Microsoft Microsoft Copilot Information Disclosure · Microsoft
What happened
<p>Improper neutralization of special elements used in a command ('command injection') in Microsoft Copilot allows an unauthorized attacker to disclose information over a network.</p>
What it means for your business
Microsoft Copilot Information Disclosure vulnerability (CVE-2026-55946) was added to Microsoft’s security update guidance. <p>Improper neutralization of special elements used in a command ('command injection') in Microsoft Copilot allows an unauthorized attacker to disclose information over a network.</p> If you need help checking exposure, call (864) 335-9223.
EPSS probability
0.39%
Sources
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