CVE-2026-58644Vulnerability
Microsoft SharePoint Deserialization of Untrusted Data Vulnerability
Reported by 4 independent sources · first reported by CERT-FR · last reported
Last reported 22 days ago
Fix due 19 Jul 2026
Used by ransomware: not knownCISA KEV catalogue
higher than 96% of CVEsFIRST EPSS, as of 23 Oct 2026
What the reports say
4 reports, newest first · the exact sentence from each-
Warlock Expands SharePoint Exploitation in Critical Infrastructure Attacks“In addition 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-2026-58644”
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Security Alert: [Updated] Microsoft Releases July 2026 Security Updates“Microsoft has updated its advisory and stated that the remote code execution vulnerability in SharePoint (CVE-2026-58644), which was addressed in this month's security updates, has been exploited in the wild.”
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Multiples vulnérabilités dans Microsoft Sharepoint (22 juillet 2026)“Bulletin de sécurité Microsoft CVE-2026-58644 du 14 juillet 2026”
Indicators reported together
named in the same reportsAlso named with it: CVE-2026-50522, CVE-2026-56164, 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, CVE-2021-27137
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