CVE-2026-78501
Medium
Elevated severity or exploit probability.
CVSS base
7.4
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
EPSS — probability of exploitation (30 days)
0.9%
57.7th percentile
CISA KEV
Not listed
Weakness / dates
CWE-77
Published 2026-09-17 · modified 2026-09-18
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.