Description
Improper neutralization of special elements used in a command ('command injection') in Microsoft 365 Copilot's Business Chat allows an unauthorized attacker to disclose information over a network.
Affected products
microsoft: 365 copilot chat
References1
- msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78501 PatchVendor Advisory
Metrics
- CVSS 3.1
-
8.6
HIGH
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N - EPSS — exploit probability
- 1% percentile: 46 · as of 8 November 2026
- CWE
- CWE-77CWE-923
Could this be exploited in your environment?
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