CVE-2026-50517
published 2026-07-24CVE-2026-50517: Deserialization of untrusted data in M365 Copilot allows an authorized attacker to execute code over a network.
PriorityP269critical9.9CVSS 3.1
AVNACLPRLUINSCCHIHAH
EPSS
1.25%
67.4th percentile
Deserialization of untrusted data in M365 Copilot allows an authorized attacker to execute code over a network.
Affected
1 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | microsoft_365_copilot | — | — |
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GHSA
Deserialization of untrusted data in M365 Copilot allows an authorized attacker to execute code over a network.
ghsa_unreviewed·2026-07-24
CVE-2026-50517 [CRITICAL] CWE-502 Deserialization of untrusted data in M365 Copilot allows an authorized attacker to execute code over a network.
Deserialization of untrusted data in M365 Copilot allows an authorized attacker to execute code over a network.
VulDB
Microsoft Copilot deserialization
vuldb·2026-07-24·CVSS 9.9
CVE-2026-50517 [CRITICAL] Microsoft Copilot deserialization
A vulnerability marked as critical has been reported in Microsoft Copilot. This affects an unknown function. The manipulation leads to deserialization.
This vulnerability is documented as CVE-2026-50517. The attack can be initiated remotely. There is not any exploit available.
This product is available as a managed service. Users are not able to maintain vulnerability countermeasures themselves.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-07-24
Published