System crash via NAT out-of-bounds read
Published Feb 13, 2024 · Updated Aug 10, 2026
Out-of-bounds read in Windows Network Address Translation allows remote attackers to crash affected Windows systems via network traffic. Microsoft identifies an out-of-bounds read in the NAT component but has not disclosed the affected function, input field, or missing bounds check. No authentication or user interaction is required, but successful exploitation has high complexity and affects availability only.
Summary
What happened
Out-of-bounds read in Windows Network Address Translation allows remote attackers to crash affected Windows systems via network traffic. Microsoft identifies an out-of-bounds read in the NAT component but has not disclosed the affected function, input field, or missing bounds check. No authentication or user interaction is required, but successful exploitation has high complexity and affects availability only.
The record
- CVE
- CVE-2024-21343
- Published
- Feb 13, 2024
- Updated
- Aug 10, 2026
- Vendor
- Microsoft
- Product
- Windows 10 Version 1507
- Classifications
- CWE-125, T1499
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 13, 2024CVE publishedPublication date reported by the CVE source.
- Aug 10, 2026Record 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 <10.0.10240.20469
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.
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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