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type: cve · created: 2026-08-13 · updated: 2026-08-18 · tags: [cve, sharepoint, microsoft, exploited-this-year] · confidence: high · severity: not-rated · affected_sectors: [technology, government, enterprise] · au_impact: false

CVE-2026-56164 — Microsoft SharePoint Vulnerability

CVE-2026-56164 is a Microsoft SharePoint vulnerability. It is one of the five SharePoint vulnerabilities exploited in 2026, listed alongside CVE-2026-45659, CVE-2026-58644, CVE-2026-55040 and CVE-2026-50522, and cited in reporting on the actively exploited CVE-2026-55040 security-feature bypass.

Summary

The digest notes this flaw as one of the SharePoint bugs already exploited this year, providing context for the rapid exploitation of CVE-2026-55040. The five-bug pattern underscores Microsoft SharePoint as a primary, internet-exposed attack surface in 2026.

Affected products

Microsoft SharePoint

Remediation/Patches

Apply current Microsoft SharePoint security updates; no standalone remediation detail was published in this digest cycle.

Sources

The Hacker News — Attackers Exploit SharePoint Authentication Bypass After Public PoC Release
raw/digests/Cyber-Digest-2026-08-14