CVE-2026-78501

HighCVSS 8.6/10Last modified Oct 14, 2026

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.

Metrics

CVSS 3.1 8.6/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

Weakness enumeration

CWE-77CWE-923

Affected software

VendorProductVersions
MicrosoftMicrosoft 365 Copilot's Business Chat-

References

Timeline

Published
Sep 17, 2026
Last modified
Oct 14, 2026
NVD status
Modified

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CVE-2026-78501: High severity, CVSS 8.6 | Vulnix