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Critical severity9.9NVD Advisory· Published Jul 24, 2026· Updated Jul 29, 2026

CVE-2026-50517

CVE-2026-50517

Description

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

Affected products

2

Microsoft/365 Copilot
cpe:2.3:a:microsoft:365_copilot:-:*:*:*:*:*:*:*
Microsoft/M365 Copilotllm-fuzzy

Patches

Vulnerability mechanics

References

1

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50517nvdVendor Advisory

News mentions

0

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