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Wednesday, 28 October 2026
5 agent hacks today▼ 5 vs yesterday (10)
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Incident database

CVE-2026-50517: Unsafe deserialization in M365 Copilot

Deserialization of untrusted data in M365 Copilot allows an authorized attacker to execute code over a network.

Disclosed 24 July 2026 · Record updated 1 October 2026

Impact

Authorized attacker can execute code over a network through unsafe deserialization

Our coverage

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Sources

  1. nvd.nist.govhttps://nvd.nist.gov/vuln/detail/CVE-2026-50517