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    CVE-2026-85887

    Incorrect permission assignment for critical resource in M365 Copilot allows an authorized attacker to disclose information over a network.

    Published:Sep 17, 2026
    Last Modified:Sep 28, 2026
    EPS:Sep 17, 2026
    EPSS Score:0.00859
    CVSS Score:7.7

    Affected Products

    Vendor
    Microsoft
    Product
    365 Copilot

    Exploits

    No exploit reference

    Related CVEs

    CVE-2026-85885 (CVSS 9.9) — Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an …
    CVE-2026-50517 (CVSS 9.9) — Deserialization of untrusted data in M365 Copilot allows an authorized attacker to execute code over a network…
    CVE-2026-41106 (CVSS 9.3) — Url redirection to untrusted site ('open redirect') in M365 Copilot allows an unauthorized attacker to elevate…
    CVE-2026-47645 (CVSS 8.8) — Url redirection to untrusted site ('open redirect') in Microsoft 365 Copilot's Business Chat allows an unautho…
    CVE-2026-42895 (CVSS 6.5) — Improper neutralization of special elements used in a command ('command injection') in Microsoft Copilot allow…
    CVE-2026-54130 (CVSS 9.8) — Missing authentication for critical function in M365 Copilot allows an unauthorized attacker to disclose infor…
    CVE-2026-45497 (CVSS 7.7) — Improper neutralization of special elements used in a command ('command injection') in Microsoft Copilot allow…
    CVE-2026-42824 (CVSS 6.5) — Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an …
    CVE-2026-41090 (CVSS 9.3) — Improper neutralization of special elements used in a command ('command injection') in Microsoft Copilot allow…
    CVE-2026-42827 (CVSS 6.5) — Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an …

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-85887 — Microsoft (High 7.7) | CVE-DB