Unauthenticated service interruption via undisclosed divide by zero
Published Mar 12, 2024 · Updated May 3, 2025
Denial of service in the Microsoft AllJoyn API on affected Windows releases allows remote attackers to interrupt service over a network. Microsoft maps the flaw to divide by zero but has not disclosed which AllJoyn API routine divides an attacker-controlled value or how the value reaches it. No authentication or user interaction is required; successful exploitation affects availability only, although Microsoft does not specify whether the result is a hang, crash, reboot, or shutdown.
Summary
What happened
Denial of service in the Microsoft AllJoyn API on affected Windows releases allows remote attackers to interrupt service over a network. Microsoft maps the flaw to divide by zero but has not disclosed which AllJoyn API routine divides an attacker-controlled value or how the value reaches it. No authentication or user interaction is required; successful exploitation affects availability only, although Microsoft does not specify whether the result is a hang, crash, reboot, or shutdown.
The record
- CVE
- CVE-2024-21438
- Published
- Mar 12, 2024
- Updated
- May 3, 2025
- Vendor
- Microsoft
- Product
- Windows 10 Version 1507
- Classifications
- CWE-369, T1499
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 12, 2024CVE publishedPublication date reported by the CVE source.
- May 3, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.0.10240.0 <10.0.10240.20526
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
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo