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CVE-2026-58644

CWE-502

Deserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute code over a network.

CVSS Score
9.8
Critical
EPSS — Exploit Probability
16%
Riskier than 97% of all CVEs
Exploitation
Confirmed in the wild
KEV since 2026-07-16
Remediation
Patch available
Federal deadline 2026-07-19
NVD entry Vendor patch PoC / advisory CISA KEV

11 articles across 6 outlets · first covered Jul 15, 2026 · latest Jul 22, 2026

Coverage timeline