Should I be concerned about CVE-2025-55234 if my organization uses SMB?

CVE-2025-55234 is an SMB relay attack that Microsoft released primarily to provide audit capabilities. Since SMB relay attacks are not new, the main value is in the auditing features rather than addressing a novel vulnerability. Organizations should review their SMB configurations and consider implementing the new audit capabilities to detect potential relay attacks.

Do I need to take action on the Azure Entra privilege escalation vulnerability?

No direct action is required as Microsoft has automatically patched CVE-2025-55241. However, given Azure Entra's critical role in identity management, it's recommended to contact Microsoft to verify whether your environment was affected and to understand how the vulnerability was discovered.

September 2025 Patch Tuesday: SMB Relay & Azure Entra

Name: September 2025 Patch Tuesday: SMB Relay & Azure Entra
Uploaded: 2026-03-30T18:19:20-04:00
Duration: 2 min 4 s
Description: TL;DR CVE-2025-55234 is an SMB relay attack that Microsoft released to provide audit capabilities, raising questions about whether it should be classified as a CVE since SMB relay attacks are not new. CVE-2025-55232 is a critical unauthenticated remote...

Fortra

03/30/2026

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TL;DR

CVE-2025-55234 is an SMB relay attack that Microsoft released to provide audit capabilities, raising questions about whether it should be classified as a CVE since SMB relay attacks are not new.
CVE-2025-55232 is a critical unauthenticated remote code execution vulnerability in Microsoft HPC Pack, though exploitation is considered less likely due to limited deployment of the software.
CVE-2025-55241 is a no-privileges-required privilege escalation in Azure Entra that has been automatically patched, but organizations should verify if their environments were affected given Entra's critical role.

Summary

Tyler Reguly, Associate Director of Security R&D at Fortra, provides a focused analysis of September 2025's Microsoft Patch Tuesday release, highlighting three vulnerabilities that warrant attention from IT and security teams. The briefing examines CVE-2025-55234, an SMB relay attack that Microsoft released primarily for audit capabilities rather than as a traditional vulnerability disclosure—a decision that raises questions about CVE assignment practices. Reguly also covers CVE-2025-55232, a critical unauthenticated remote code execution vulnerability in Microsoft's High Performance Compute Pack, and CVE-2025-55241, a privilege escalation issue in Azure Entra that requires no user privileges. While the Azure Entra vulnerability has been patched automatically by Microsoft, Reguly recommends organizations verify whether their environments were affected. This concise update helps administrators prioritize patching efforts and understand the strategic implications of Microsoft's security communications.

Chapters

0:00 - Introduction
0:09 - CVE-2025-55234: SMB Relay
0:40 - CVE-2025-55232: HPC Pack RCE
1:15 - CVE-2025-55241: Azure Entra Escalation

Key Quotes

0:18 "Microsoft states that they released the CVE to provide customers with audit capabilities. Now the goal of a CVE should be to define a vulnerability, not to announce new configuration features."
0:54 "The vulnerability allows for unauthenticated remote code execution. Hopefully that risk will be offset by the fact that not everyone runs this software, and that's likely one of the reasons why Microsoft has indicated that exploitation is less likely for this vulnerability."
1:35 "Azure Entra is such a critical component in environments, and it's something that you might want to talk to Microsoft about just to find out a bit more about how this vulnerability was discovered, or to find out if it had ever been exploited in the past in your environment."

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» Cybersecurity » Cloud Security
» Data Protection

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