SB2025021195 - Multiple vulnerabilities in Microsoft Windows Telephony Service
Published: February 11, 2025 Updated: March 10, 2025
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 5 secuirty vulnerabilities.
1) Heap-based buffer overflow (CVE-ID: CVE-2025-21200)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in Windows Telephony Service. A remote attacker can trick a victim to connect to a malicious server, trigger a heap-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
2) Heap-based buffer overflow (CVE-ID: CVE-2025-21407)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in Windows Telephony Service. A remote attacker can trick a victim to connect to a malicious server, trigger a heap-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
3) Heap-based buffer overflow (CVE-ID: CVE-2025-21371)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in Windows Telephony Service. A remote attacker can trick a victim to connect to a malicious server, trigger a heap-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
4) Heap-based buffer overflow (CVE-ID: CVE-2025-21190)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in Windows Telephony Service. A remote attacker can trick a victim to connect to a malicious server, trigger a heap-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
5) Use-after-free (CVE-ID: CVE-2025-21406)
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a use-after-free error in Windows Telephony Service. A remote attacker can trick a victim to connect to a malicious server and execute arbitrary code on the target system.
Remediation
Install update from vendor's website.
References
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-21200
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-21407
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-21371
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-21190
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-21406