ZeroDay Findings
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Findings

CVE-2026-41100

Improper access control in M365 Copilot allows an authorized attacker to perform spoofing locally.

Published May 12, 2026 · updated Jun 17, 2026 · microsoft 365 copilot

Improper access control in M365 Copilot allows an authorized attacker to perform spoofing locally.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. May 12, 2026 · NIST NVD

    Detected

    Improper access control in M365 Copilot allows an authorized attacker to perform spoofing locally.

  2. Jun 17, 2026 · NIST NVD

    Updated

    Improper access control in M365 Copilot allows an authorized attacker to perform spoofing locally.

Affected

  • cpe microsoft/365 copilotversion unspecified

Sources

  • CVE.orgVulnerability recordCVE-2026-41100

    Official CVE identifier

    cve.org
  • NIST NVDVulnerability recordCVE-2026-41100

    Improper access control in M365 Copilot allows an authorized attacker to perform spoofing locally.

    nvd.nist.gov

References