CVE-2026-50522Vulnerability
Microsoft SharePoint Deserialization of Untrusted Data Vulnerability
Reported by 5 independent sources · first reported by CERT-FR · last reported
Last reported 18 days ago
Fix due 25 Jul 2026
Used by ransomware: not knownCISA KEV catalogue
higher than 87% of CVEsFIRST EPSS, as of 23 Oct 2026
What the reports say
5 reports, newest first · the exact sentence from each-
Q3 2026 Vulnerability Trend Report“CVE-2026-50522 A deserialization vulnerability (the process of converting untrusted data into objects) in Microsoft SharePoint that allows an unauthenticated remote threat actor to perform arbitrary code execution.”
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Warlock Expands SharePoint Exploitation in Critical Infrastructure Attacks“…tion to ToolShell, its arsenal may also include recent flaws such as CVE-2026-32201, CVE-2026-45659, CVE-2026-56164, CVE-2026-58644, CVE-2026-50522, and CVE-2026-55040.”
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July 2026 CVE Landscape“CVE-2026-50522”
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Security Alert: [Updated] Microsoft Releases July 2026 Security Updates“In addition, another remote code execution vulnerability (CVE-2026-50522)has been added to CISA's Known Exploited Vulnerabilities (KEV) Catalog.Information believed to include a proof-of-concept (PoC) exploit for this vulnerability has been published by a security researcher.”
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Multiples vulnérabilités dans Microsoft Sharepoint (22 juillet 2026)“Bulletin de sécurité Microsoft CVE-2026-50522 du 14 juillet 2026”
Indicators reported together
named in the same reportsAlso named with it: CVE-2026-58644, CVE-2026-56164, CVE-2026-16812, CVE-2026-56155, CVE-2026-45659, CVE-2025-49113, CVE-2026-33824, CVE-2024-42009, CVE-2026-15409, CVE-2026-15410, CVE-2026-25089, CVE-2026-39808, CVE-2026-42897, CVE-2026-32201, CVE-2025-55182, CVE-2018-0802, CVE-2025-3248, CVE-2008-4128, CVE-2017-17215, CVE-2021-4034
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