Threat Intelligence / CVE / CVE-2026-56155
CVE-2026-56155
CISA KEVAs of 2026-07-14, CVE-2026-56155 is a CVSS 7.8 (HIGH-severity) vulnerability. CISA KEV-listed (known exploited). Threadlinqs Intelligence tracks 16 threats exploiting it.
Last updated: 2026-07-14
Insufficient granularity of access control in Active Directory Federation Services (AD FS) allows an authorized attacker to elevate privileges locally.
CVSS v3 vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
Weaknesses (CWE)
CWE-1220
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
- Microsoft July 2026 Patch Tuesday: Two Actively Exploited Zero-Days (CVE-2026-56155 AD FS, CVE-2026-56164 SharePoint) Among Record 570+ Fixes — HIGH
- 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
- 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
- CVE-2026-56155: Microsoft AD FS Elevation-of-Privilege Vulnerability Actively Exploited — HIGH
- 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
Full detection coverage & IOCs for threats exploiting CVE-2026-56155 are available via the Threadlinqs MCP server (Purple tier). View plans →
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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.