Microsoft KB Update (August 12, 2025) – Medium Severity

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announcement-2025-08-12T00-16-01-336Z
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On August 12, 2025, Microsoft released KB updates that conflict with Netwrix Threat Prevention (formerly StealthINTERCEPT) agents used by Threat Manager for AD to collect AD event data. If these KBs are applied before updating the agents, certain LDAP and Kerberos events will no longer be captured or blocked.

Netwrix recommends delaying the deployment of these KBs if the impacted event types are important to your organization. The Netwrix development and QA teams are working on updated agents compatible with these KBs and will send another notice when they are available.

:double_exclamation_mark: Important Details

If your Threat Manager for AD deployment does not use Threat Prevention (formerly StealthINTERCEPT) agents for the following activity event collection, or such events are not deemed important, you may elect to deploy the following Microsoft KBs in advance of updated Netwrix Threat Prevention agents.

No other aspect of Threat Manager operation is impacted by the August 12, 2025 KBs beyond what is described below. There is no adverse impact to domain controllers if the KBs are deployed without updating the agents.

Event Types Affected:

  • Windows Server 2025: Capture LDAP Bind activity; capture or block Kerberos Authentication activity
  • Windows Server 2022: Capture or block Kerberos Authentication activity

Severity: Medium

Affected Products:

  • Netwrix Threat Prevention (formerly StealthINTERCEPT) for Active Directory
  • Netwrix Threat Manager (formerly StealthDEFEND) for Active Directory

Affected Netwrix Threat Prevention (formerly StealthINTERCEPT) Agents - all prior to:

  • 7.5.0.227
  • 7.4.0.233
  • 7.3.9.309
  • 7.3.7.479

Affected Systems:

  • Windows Server 2025 (for Active Directory)
  • Windows Server 2022 (for Active Directory)

Affected Microsoft KBs:

  • Windows Server 2025 – KB5063878
  • Windows Server 2022 – KB5063880

Impact:

Functional:

  • Windows Server 2025 – KB5063878
    • Agents will lose the ability to capture LDAP Bind events and capture or block Kerberos Authentication events
    • Expected ADMonitor_Logs errors:
      • Couldn't resolve LDAP_CONN::BindRequest
      • Couldn't resolve KdcVerifyKdcRequest
      • Failed to resolve KerberosCryptoPolicy::SelectEncryptionType
  • Windows Server 2022 – KB5063880
    • Agents will lose the ability to capture or block Kerberos Authentication events
    • Expected ADMonitor_Logs error:
      • Couldn't resolve I_GetASTicket

Stability:

  • No stability impact on any server platforms or domain controllers