AI and data stack advisories

Severe, 6 weeks1496Projects326

1496 severe, 6 weeks · 326 projects

MicrosoftCVE-2026-50517

Microsoft 365 Copilot: unsafe deserialization

Microsoft

CVE-2026-50517 · Published Jul 24, 2026 · updated Jul 29, 2026

Critical9.9
No fix yet
Microsoft advisory

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

Affected versions

PackageAffectedFixed in
Microsoft 365 Copilot
Product
all versionsNo fix yet
Details and references
CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Severity from
the vendor (its own CVE record or advisory)
Weakness
CWE-502

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