PT-2026-64203 · Microsoft · M365 Copilot
CVE-2026-50517
·
Published
2026-07-24
·
Updated
2026-07-25
CVSS v3.1
9.9
Critical
| Vector | AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Microsoft M365 Copilot (affected versions not specified)
Description
Deserialization of untrusted data allows an authorized attacker to execute code over a network. Deserialization is the process of converting a data stream back into an object, which can be exploited if the input is not properly validated.
Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
RCE
Deserialization of Untrusted Data
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Weakness Enumeration
Related Identifiers
Affected Products
M365 Copilot