Menu

  • Alerts
  • Incidents
  • News
  • APTs
  • Cyber Decoded
  • Cyber Hygiene
  • Cyber Review
  • Cyber Tips
  • Definitions
  • Malware
  • Threat Actors
  • Tutorials

Useful Tools

  • Password generator
  • Report an incident
  • Report to authorities
No Result
View All Result
CTF Hack Havoc
CyberMaterial
  • Education
    • Cyber Decoded
    • Definitions
  • Information
    • Alerts
    • Incidents
    • News
  • Insights
    • Cyber Hygiene
    • Cyber Review
    • Tips
    • Tutorials
  • Support
    • Contact Us
    • Report an incident
  • About
    • About Us
    • Advertise with us
Get Help
Hall of Hacks
  • Education
    • Cyber Decoded
    • Definitions
  • Information
    • Alerts
    • Incidents
    • News
  • Insights
    • Cyber Hygiene
    • Cyber Review
    • Tips
    • Tutorials
  • Support
    • Contact Us
    • Report an incident
  • About
    • About Us
    • Advertise with us
Get Help
No Result
View All Result
Hall of Hacks
CyberMaterial
No Result
View All Result
Home Alerts

Windows MSMQ Flaw Exposes Servers

April 13, 2023
Reading Time: 2 mins read
in Alerts

 

 

Security researchers have identified a critical vulnerability in the Windows Message Queuing (MSMQ) middleware service, with the potential to expose hundreds of thousands of systems to attack. The flaw, CVE-2023-21554, enables unauthenticated attackers to remotely execute code on unpatched Windows servers.

The vulnerability has been patched by Microsoft, but all supported versions of Windows, including the latest Windows 11 22H2 and Windows Server 2022, are affected. Microsoft has warned that the flaw has previously been exploited, making it a priority for customers who have reviewed the security update and determined its applicability within their environment.

Security firm Check Point Research has estimated that over 360,000 internet-exposed MSMQ servers are vulnerable to the flaw. The actual number of unpatched systems is expected to be higher, as the estimate only includes devices running the MSMQ service that are reachable over the internet.

While the MSMQ service is not enabled by default on most systems, it is a middleware service used by other software, which can be toggled on in the background when installing enterprise apps, and will remain running after uninstallation.

Microsoft has advised organisations that can’t immediately deploy the patch to disable the Windows MSMQ service if possible. Admins can check if there is a service running named Message Queuing and TCP port 1801 is listening on their machine.

Organisations that cannot disable MSMQ or deploy Microsoft’s patch can also block 1801/TCP connections from untrusted sources using firewall rules. The flaw was reported to Microsoft by researchers Wayne Low of Fortinet’s FortiGuard Lab and Haifei Li of Check Point Research.

Reference:
  • Microsoft Message Queuing Remote Code Execution Vulnerability

Tags: April 2023Check Point ResearchCyber AlertCyber Alerts 2023MSMQPatchSoftwareVulnerabilitiesWindows Message Queuing
ADVERTISEMENT

Related Posts

Glibc Flaw Gives Linux Root Access Risk

Mozilla Urgent Firefox Patch Fixes RCE Flaws

May 19, 2025
Fileless Remcos RAT Delivery Via LNK Files

ModiLoader Malware Targets Windows Users

May 19, 2025
Glibc Flaw Gives Linux Root Access Risk

Glibc Flaw Gives Linux Root Access Risk

May 19, 2025
Fileless Remcos RAT Delivery Via LNK Files

APT28 RoundPress Webmail Hack Steals Emails

May 16, 2025
Fileless Remcos RAT Delivery Via LNK Files

FBI Warns of AI Voice Phishing Scams

May 16, 2025
Fileless Remcos RAT Delivery Via LNK Files

Fileless Remcos RAT Delivery Via LNK Files

May 16, 2025

Latest Alerts

Mozilla Urgent Firefox Patch Fixes RCE Flaws

ModiLoader Malware Targets Windows Users

Glibc Flaw Gives Linux Root Access Risk

Fileless Remcos RAT Delivery Via LNK Files

FBI Warns of AI Voice Phishing Scams

APT28 RoundPress Webmail Hack Steals Emails

Subscribe to our newsletter

    Latest Incidents

    Massive DDoS Hits Poland’s Civic Platform

    Arla Plant Cyberattack Halts Operations

    Georgia’s Harbin Clinic Hit by Data Breach

    Hackers Target Swiss Reserve Power Plant

    Coinbase Insider Attack Exposed User Data

    Cyberattack Hits J Batista Group

    CyberMaterial Logo
    • About Us
    • Contact Us
    • Jobs
    • Legal and Privacy Policy
    • Site Map

    © 2025 | CyberMaterial | All rights reserved

    Welcome Back!

    Login to your account below

    Forgotten Password?

    Retrieve your password

    Please enter your username or email address to reset your password.

    Log In

    Add New Playlist

    No Result
    View All Result
    • Alerts
    • Incidents
    • News
    • Cyber Decoded
    • Cyber Hygiene
    • Cyber Review
    • Definitions
    • Malware
    • Cyber Tips
    • Tutorials
    • Advanced Persistent Threats
    • Threat Actors
    • Report an incident
    • Password Generator
    • About Us
    • Contact Us
    • Advertise with us

    Copyright © 2025 CyberMaterial