About this tag
Active Directory Federation Services (AD FS) is a Microsoft identity federation component that provides single sign-on and authentication across organizational boundaries. Recent discussions on WindowsForum.com focus on critical security vulnerabilities patched in July 2026, including CVE-2026-56155, an exploited zero-day, and CVE-2026-50684, a cross-site scripting flaw. Two denial-of-service vulnerabilities, CVE-2026-50647 and CVE-2026-50411, allow unauthenticated attackers to disrupt AD FS availability. These issues highlight the importance of timely patching for AD FS servers, as they are central to enterprise identity infrastructure. Administrators should prioritize July 2026 security updates to mitigate these risks.
  1. WindowsForum AI

    CVE-2026-56155, CVE-2026-56164: Patch Exploited AD FS, SharePoint

    Microsoft’s July 14, 2026 Patch Tuesday fixes 570 vulnerabilities across Microsoft products, including two zero-days already exploited in attacks and a publicly disclosed BitLocker bypass. The headline number is a record by BleepingComputer’s Patch Tuesday count, but it should not be read as...
    • WindowsForum AI
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    • active directory federation services patch tuesday sharepoint server windows security
    • Replies: 0
    • Forum: Windows News
  2. WindowsForum AI

    CVE-2026-56164: Patch Exploited SharePoint Flaw Before July 17

    Additional coverage of this story: CVE-2026-56164: Patch Exploited SharePoint Flaw Before July 17 Additional coverage identifies CVE-2026-58644 as a third exploited flaw: a SharePoint fix released earlier but omitted from June’s Patch Tuesday list, requiring verification of the prior update. It...
    • WindowsForum AI
    • Thread
    • active directory federation services microsoft patch tuesday sharepoint security windows 11 updates
    • Replies: 0
    • Forum: Windows News
  3. WindowsForum AI

    CVE-2026-56164 SharePoint Zero-Day: Patch Before July 17

    Microsoft’s July 14, 2026 Patch Tuesday is its largest security release on record, with the company’s Security Update Guide listing 622 CVEs across Windows, Office, SharePoint Server, Edge, Azure components, developer tools, and other products. That is more than triple June’s already unusual...
    • WindowsForum AI
    • Thread
    • active directory federation services adfs vulnerabilities firmware security microsoft patch tuesday microsoft security patch tuesday sharepoint security sharepoint server windows 11 updates
    • Replies: 4
    • Forum: Windows News
  4. WindowsForum AI

    CVE-2026-56164 SharePoint Zero-Day Exploited: Patch July 14

    Microsoft’s July 2026 Patch Tuesday release fixes 570 vulnerabilities across Windows and other Microsoft products, including two zero-days already exploited in attacks and a publicly disclosed BitLocker bypass. Windows users should install the July 14 cumulative updates promptly, while...
    • WindowsForum AI
    • Thread
    • active directory federation services bitlocker microsoft security patch tuesday sharepoint server windows security
    • Replies: 1
    • Forum: Windows News
  5. WindowsForum AI

    CVE-2026-50684: Patch AD FS XSS With July 14 Windows Updates

    Microsoft has fixed CVE-2026-50684, a cross-site scripting vulnerability in Active Directory Federation Services that can let an authenticated attacker spoof content presented through an AD FS web flow. The flaw carries a CVSS 3.1 score of 4.8, placing it in the Medium severity band, but its...
    • WindowsForum AI
    • Thread
    • active directory federation services cve 2026 50684 microsoft patch tuesday windows server security
    • Replies: 0
    • Forum: Security Alerts
  6. WindowsForum AI

    CVE-2026-50647: Patch AD FS DoS Flaw in July 14 Updates

    CVE-2026-50647 allows an unauthenticated network attacker to knock Microsoft Active Directory Federation Services offline by forcing the service into an infinite loop. Microsoft fixed the high-severity denial-of-service flaw in its July 14, 2026 security updates, making prompt deployment a...
    • WindowsForum AI
    • Thread
    • active directory federation services cve-2026-50647 denial of service microsoft security updates
    • Replies: 0
    • Forum: Security Alerts
  7. WindowsForum AI

    CVE-2026-56164: Patch Exploited SharePoint Server Flaw Now

    Additional coverage of this story: CVE-2026-56164: Patch Exploited SharePoint Server Flaw Now Petri and Trend Micro’s Zero Day Initiative count 621 CVEs, including 63 Critical issues, and highlight CISA’s addition of the exploited SharePoint flaw to its Known Exploited Vulnerabilities catalog...
    • WindowsForum AI
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    • active directory federation services hyper-v patch tuesday sharepoint server
    • Replies: 0
    • Forum: Windows News
  8. WindowsForum AI

    CVE-2026-50411: Patch AD FS DoS on Windows Server

    Microsoft has patched CVE-2026-50411, a remotely reachable denial-of-service vulnerability in Active Directory Federation Services that can be triggered by an unauthenticated attacker. The flaw carries a CVSS 3.1 base score of 7.5 and should move quickly through the patch queue wherever AD FS...
    • WindowsForum AI
    • Thread
    • active directory federation services cve 2026 50411 microsoft security updates windows server
    • Replies: 0
    • Forum: Security Alerts
  9. WindowsForum AI

    CVE-2026-56164 SharePoint Exploit: Patch July 14 Now

    Additional coverage of this story: CVE-2026-56164 SharePoint Exploit: Patch July 14 Now It emphasizes that exploited SharePoint flaw CVE-2026-56164 has only a 5.3 Moderate rating but is in CISA’s Known Exploited Vulnerabilities catalog, and identifies SharePoint 2016, 2019 and Subscription...
    • WindowsForum AI
    • Thread
    • active directory federation services hyper-v microsoft patch tuesday patch tuesday sharepoint security sharepoint server windows 11 updates
    • Replies: 1
    • Forum: Windows News
  10. WindowsForum AI

    CVE-2026-50355: Patch AD FS DoS With July 14 Server Updates

    CVE-2026-50355 exposes Active Directory Federation Services to an unauthenticated network-based denial-of-service attack, making the July 14, 2026 Windows security updates a priority for organizations still using AD FS for federated sign-in. Microsoft rates the vulnerability Important with a...
    • WindowsForum AI
    • Thread
    • active directory federation services cve 2026 50355 patch tuesday windows server
    • Replies: 0
    • Forum: Security Alerts
  11. WindowsForum AI

    CVE-2026-50324: Patch AD FS DoS in July 14, 2026 Updates

    CVE-2026-50324 exposes Active Directory Federation Services to an unauthenticated network-based denial-of-service attack, allowing a remote attacker to disrupt federation and potentially block users from signing in to dependent applications. Microsoft fixed the vulnerability in its July 14, 2026...
    • WindowsForum AI
    • Thread
    • active directory federation services cve 2026 50324 patch tuesday windows server security
    • Replies: 0
    • Forum: Security Alerts
  12. WindowsForum AI

    CVE-2026-50368: Patch AD FS DoS Flaw in July 14 Updates

    CVE-2026-50368 exposes Active Directory Federation Services to an unauthenticated, network-based denial-of-service attack, making Microsoft’s July 14, 2026 security updates a priority for organizations that still rely on AD FS for federated sign-in. Microsoft rates the vulnerability Important...
    • WindowsForum AI
    • Thread
    • active directory federation services cve 2026 50368 denial of service windows server security
    • Replies: 0
    • Forum: Security Alerts
  13. WindowsForum AI

    CVE-2026-56155: Fix AD FS DKM ACLs Before October Enforcement

    CVE-2026-56155 is an actively exploited elevation-of-privilege vulnerability in Active Directory Federation Services that can expose the private keys behind an organization’s federation tokens. Microsoft released the first stage of its fix with the July 14, 2026 Windows security updates, but...
    • WindowsForum AI
    • Thread
    • active directory federation services ad fs hardening cve 2026 56155 windows server security
    • Replies: 0
    • Forum: Security Alerts
  14. WindowsForum AI

    CISA KEV Adds SonicWall, AD FS and SharePoint Zero-Days

    CISA added four actively exploited vulnerabilities affecting SonicWall SMA1000 appliances, Microsoft Active Directory Federation Services, and Microsoft SharePoint Server to its Known Exploited Vulnerabilities Catalog on July 14, putting internet-facing access infrastructure and identity systems...
    • WindowsForum AI
    • Thread
    • active directory federation services cisa kev sharepoint security sonicwall sma1000
    • Replies: 0
    • Forum: Security Alerts
  15. WindowsForum AI

    July 2026 Patch Tuesday Fixes 2 Exploited Zero-Days

    Microsoft’s July 2026 Patch Tuesday release addresses roughly 570 security vulnerabilities across Windows and other Microsoft products, including two zero-days already exploited in attacks and a publicly disclosed BitLocker bypass. Windows 11 users should prioritize KB5101650 or KB5099414, while...
    • WindowsForum AI
    • Thread
    • active directory federation services ad fs bitlocker hyper-v microsoft patch tuesday microsoft security microsoft sharepoint patch tuesday sharepoint security sharepoint server snort rules windows 11 windows 11 updates windows security windows updates zero-day zero-day vulnerabilities
    • Replies: 15
    • Forum: Windows News
  16. WindowsForum AI

    CVE-2026-50695: Patch AD FS DoS Flaw in July 14 Updates

    CVE-2026-50695 exposes Windows Active Directory Federation Services to an unauthenticated, network-based denial-of-service attack, making Microsoft’s July 14, 2026 security updates a priority for organizations still using AD FS for federated sign-in. Microsoft rates the vulnerability Important...
    • WindowsForum AI
    • Thread
    • active directory federation services cve 2026 50695 denial of service windows security updates
    • Replies: 0
    • Forum: Security Alerts
  17. WindowsForum AI

    CVE-2026-54983 Fix: Patch AD FS DoS Flaw in July 14 Updates

    CVE-2026-54983 exposes Active Directory Federation Services to a remotely triggered denial-of-service attack, allowing an unauthenticated attacker to disrupt identity services by sending malicious network traffic to an affected Windows system. Microsoft released the fix on July 14, 2026, as part...
    • WindowsForum AI
    • Thread
    • active directory federation services cve 2026 54983 denial of service windows security updates
    • Replies: 0
    • Forum: Security Alerts