CVE-2026-56164

As of 2026-07-14, CVE-2026-56164 is a CVSS 5.3 (MEDIUM-severity) vulnerability. CISA KEV-listed (known exploited). Threadlinqs Intelligence tracks 19 threats exploiting it.

Last updated: 2026-07-14

Missing authentication for critical function in Microsoft Office SharePoint allows an unauthorized attacker to elevate privileges over a network.

CVSS v3 vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:F/RL:O/RC:C

Weaknesses (CWE)

CWE-306

Exploitation status

CISA KEV-listed (known exploited)

Threats tracking this CVE

• Actively Exploited SonicWall SMA1000 Zero-Days (CVE-2026-15409, CVE-2026-15410) Chained for Full Appliance Takeover Alongside Microsoft July 2026 Patch Tuesday (570 CVEs, 3 Zero-Days incl. SharePoint & AD FS EoP) — CRITICAL
• July 2026 Patch Tuesday: Actively Exploited SharePoint RCE (CVE-2026-58644) and AD FS/SharePoint Zero-Days — CRITICAL
• CISA Adds Exploited SharePoint RCE Zero-Day CVE-2026-58644 to KEV Catalog — CRITICAL
• Microsoft July 2026 Patch Tuesday: Two Actively Exploited Zero-Days (CVE-2026-56155 AD FS, CVE-2026-56164 SharePoint) Among Record 570+ Fixes — HIGH
• CISA Warns of Trio of Actively Exploited SharePoint Server Flaws (CVE-2026-32201, CVE-2026-45659, CVE-2026-56164) — CRITICAL
• July 2026 Patch Tuesday: Microsoft Fixes 622 CVEs Including Three Actively-Targeted Zero-Days (CVE-2026-56155 AD FS EoP, CVE-2026-56164 SharePoint EoP, CVE-2026-50661 BitLocker Bypass) — CRITICAL
• CVE-2026-56164: Microsoft SharePoint Server Missing-Authentication Vulnerability Actively Exploited, Added to CISA KEV — CRITICAL
• Actively Exploited SharePoint Server Elevation of Privilege Flaw (CVE-2026-56164) Patched Alongside Critical RCE Pair in July 2026 Patch Tuesday — CRITICAL
• CISA Warns of Active Exploitation of Three Microsoft SharePoint Server Vulnerabilities (CVE-2026-32201, CVE-2026-45659, CVE-2026-56164) — CRITICAL
• Microsoft July 2026 Patch Tuesday: Two Actively Exploited Zero-Days in AD FS (CVE-2026-56155) and SharePoint (CVE-2026-56164), Plus Unpatched BitLocker Bypass (CVE-2026-50661) — CRITICAL
• July 2026 Patch Tuesday: Two Actively Exploited Microsoft Zero-Days (SharePoint EoP CVE-2026-56164, AD FS EoP CVE-2026-56155) Plus SharePoint JWT Auth Bypass CVE-2026-55040 — HIGH
• Microsoft July 2026 Patch Tuesday: Two Actively Exploited Zero-Days in AD FS and SharePoint (CVE-2026-56155, CVE-2026-56164) — CRITICAL
• Microsoft July 2026 Patch Tuesday: Record 622 Flaws Fixed, Two Zero-Days Under Active Exploitation (CVE-2026-56164, CVE-2026-56155) — CRITICAL
• Microsoft July 2026 Patch Tuesday: Record 622 CVEs Include Two Actively Exploited Zero-Days in AD FS (CVE-2026-56155) and SharePoint Server (CVE-2026-56164) — CRITICAL
• Microsoft July 2026 Patch Tuesday: 570 Vulnerabilities Including Two Under Active Exploitation (CVE-2026-56155, CVE-2026-56164) — HIGH
• Microsoft July 2026 Patch Tuesday: 569 CVEs, Two Actively Exploited Zero-Days (CVE-2026-56155 AD FS EoP, CVE-2026-56164 SharePoint EoP) — CRITICAL
• Windows 10 KB5099539 Extended Security Update Patches July 2026 Patch Tuesday Zero-Days — AD FS (CVE-2026-56155), SharePoint (CVE-2026-56164) Exploited; BitLocker (CVE-2026-50661) Publicly Disclosed — HIGH
• Microsoft July 2026 Patch Tuesday: 570 Vulnerabilities Fixed, Including 2 Actively Exploited Zero-Days (CVE-2026-56164, CVE-2026-56155) — CRITICAL
• Microsoft July 2026 Patch Tuesday: 570 Flaws Fixed, 3 Zero-Days Including AD FS and SharePoint Privilege Escalation — CRITICAL

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56164

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Enriched from CVE.org, NVD (this product uses the NVD API but is not endorsed or certified by the NVD), FIRST EPSS, CISA KEV, and GitHub Security Advisories.