PULSEUnderground Intel

LIVE15signals / 24h

FEED

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CVE WatchJul 24, 2026

CVE-2026-50517

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

CVSS

9.9

Critical

EPSS

—

KEV

—

Exploit Today

0

0-100

Published: Jul 24, 2026 · Last modified: Jul 24, 2026 · CWE-502

EPSS · 30d

Not enough EPSS history yet.

Technical description

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

Official references

msrc.microsoft.comhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50517

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