Service interruption via NULL pointer dereference
Published Jan 9, 2024 · Updated Jun 3, 2025
Denial of service in Microsoft Message Queuing on affected Windows releases allows remote attackers to interrupt service over the network. Microsoft identifies a NULL pointer dereference, but neither the affected routine nor the malformed MSMQ input that triggers it is publicly disclosed. Exploitation requires network access to a host running the MSMQ service; the published impact is limited to availability, with no reported data disclosure or modification.
Summary
What happened
Denial of service in Microsoft Message Queuing on affected Windows releases allows remote attackers to interrupt service over the network. Microsoft identifies a NULL pointer dereference, but neither the affected routine nor the malformed MSMQ input that triggers it is publicly disclosed. Exploitation requires network access to a host running the MSMQ service; the published impact is limited to availability, with no reported data disclosure or modification.
The record
- CVE
- CVE-2024-20661
- Published
- Jan 9, 2024
- Updated
- Jun 3, 2025
- Vendor
- Microsoft
- Product
- Windows 10 Version 1507
- Classifications
- CWE-476, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jan 9, 2024CVE publishedPublication date reported by the CVE source.
- Jun 3, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.0.10240.0 <10.0.10240.20402
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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