January 2023 Monthly Patch

Published on 11 Jan 2023

Updated on 11 Jan 2023

Microsoft has released security patches to address multiple vulnerabilities in their software and products.

The vulnerabilities that have been classified as Critical in severity are listed in the table below.

For the full list of security patches released by Microsoft, please refer to https://portal.msrc.microsoft.com/en-us/security-guidance/releasenotedetail/2023-Jan

CRITICAL VULNERABILITIES
CVE Number CVE Name Base Score Reference
CVE-2023-21561 Microsoft Cryptographic Services Elevation of Privilege Vulnerability 8.8 https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2023-21561
CVE-2023-21548 Windows Secure Socket Tunneling Protocol (SSTP) Remote Code Execution Vulnerability 8.1 https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2023-21548
CVE-2023-21535 Windows Secure Socket Tunneling Protocol (SSTP) Remote Code Execution Vulnerability 8.1 https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2023-21535
CVE-2023-21679 Windows Layer 2 Tunneling Protocol (L2TP) Remote Code Execution Vulnerability 8.1 https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2023-21679
CVE-2023-21556 Windows Layer 2 Tunneling Protocol (L2TP) Remote Code Execution Vulnerability 8.1 https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2023-21556
CVE-2023-21555 Windows Layer 2 Tunneling Protocol (L2TP) Remote Code Execution Vulnerability 8.1 https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2023-21555
CVE-2023-21546 Windows Layer 2 Tunneling Protocol (L2TP) Remote Code Execution Vulnerability 8.1 https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2023-21546
CVE-2023-21543 Windows Layer 2 Tunneling Protocol (L2TP) Remote Code Execution Vulnerability 8.1 https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2023-21543
CVE-2023-21730 Microsoft Cryptographic Services Elevation of Privilege Vulnerability 7.8 https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2023-21730
CVE-2023-21551 Microsoft Cryptographic Services Elevation of Privilege Vulnerability 7.8 https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2023-21551
CVE-2023-21743 Microsoft SharePoint Server Security Feature Bypass Vulnerability 5.3 https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2023-21743