CVE-2026-54130Critical· 9.8▾ MidnightMissing authentication for critical function in M365 Copilot allows an unauthorized attacker to disclose information over a network.
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 53.9 · likelihood 0.2 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
1.1%
Missing authentication for critical function in M365 Copilot allows an unauthorized attacker to disclose information over a network.
365_copilot -Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-42895Medium· 6.5Microsoft Copilot Tampering Vulnerability
CVE-2026-42824Medium· 6.5M365 Copilot Information Disclosure Vulnerability
CVE-2026-45497High· 7.7Microsoft M365 Copilot Remote Code Execution Vulnerability
CVE-2026-47645High· 8.8Microsoft 365 Copilot's Business Chat Elevation of Privilege Vulnerability
CVE-2026-85887High· 7.7Incorrect permission assignment for critical resource in M365 Copilot allows an authorized attacker to disclose information over a network.
CVE-2026-85885Critical· 9.9Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an authorized attacker to elevate privileges over a network.