Remote code execution via undisclosed integer overflow
Published Jan 14, 2025 · Updated Jun 9, 2026
Integer overflow in Microsoft Windows Telephony Service allows remote attackers to execute code after a user connects to a malicious server. Microsoft identifies CWE-190 but has not published the affected calculation, the attacker-controlled input, or the resulting memory operation. Exploitation requires user interaction; successful code execution can take control of the affected Windows system.
Summary
What happened
Integer overflow in Microsoft Windows Telephony Service allows remote attackers to execute code after a user connects to a malicious server. Microsoft identifies CWE-190 but has not published the affected calculation, the attacker-controlled input, or the resulting memory operation. Exploitation requires user interaction; successful code execution can take control of the affected Windows system.
The record
- CVE
- CVE-2025-21244
- Published
- Jan 14, 2025
- Updated
- Jun 9, 2026
- Vendor
- Microsoft
- Product
- Windows 10 Version 1507
- Classifications
- CWE-190, T1203
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jan 14, 2025CVE publishedPublication date reported by the CVE source.
- Jun 9, 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 <10.0.10240.20890
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.
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Technologies
Your stack
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Your stack
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