April 18, 2025
Proactive Defense: The Importance of Incident Response Planning in Cybersecurity
Rewterz Threat Advisory – ICS: Siemens SINEC NMS and SIMATIC
October 13, 2021Rewterz Threat Advisory – Multiple Adobe Acrobat and Adobe Reader Vulnerabilities
October 13, 2021Rewterz Threat Advisory – ICS: Siemens SINEC NMS and SIMATIC
October 13, 2021Rewterz Threat Advisory – Multiple Adobe Acrobat and Adobe Reader Vulnerabilities
October 13, 2021
Severity
High
Analysis Summary
CVE-2021-40449
Microsoft Windows could allow a local authenticated attacker to gain elevated privileges on the system, caused by a flaw in the Win32k component. By executing a specially-crafted program, an authenticated attacker could exploit this vulnerability to execute arbitrary code with higher privileges.\
CVE-2021-40469
Microsoft Windows could allow a remote authenticated attacker to execute arbitrary code on the system, caused by a flaw in the DNS Server component. By sending a specially-crafted request, an attacker could exploit this vulnerability to execute arbitrary code on the system.
CVE-2021-41335
Microsoft Windows could allow a local authenticated attacker to gain elevated privileges on the system, caused by a flaw in the Kernel. By executing a specially-crafted program, an authenticated attacker could exploit this vulnerability to execute arbitrary code with higher privileges.
CVE-2021-41338
Microsoft Windows could allow a local authenticated attacker to bypass security restrictions, caused by a flaw in the AppContainer Firewall Rules security feature. By executing a specially-crafted program, an authenticated attacker could exploit this vulnerability to bypass security feature.
Impact
- Privilege Escalation
- Remote Code Execution
- Security Bypass
Affected Vendors
Microsoft
Affected Products
- Microsoft Windows 7 SP1 x32
- Microsoft Windows 7 SP1 x64
- Microsoft Windows Server 2012
- Microsoft Windows 8.1 x32
- Microsoft Windows 8.1 x64
- Microsoft Windows Server 2012 R2
- Microsoft Windows RT 8.1
- Microsoft Windows 10 x32
- Microsoft Windows 10 x64
- Microsoft Windows Server 2016
- Microsoft Windows Server 2019
- Microsoft Windows 10 1809 for x64-based Systems
- Microsoft Windows 10 1809 for 32-bit Systems
- Microsoft Windows 10 1809 for ARM64-based Systems
- Microsoft Windows 10 1607 for 32-bit Systems
- Microsoft Windows 10 1607 for x64-based Systems
- Microsoft Windows 10 2004 for 32-bit Systems
- Microsoft Windows 10 2004 for ARM64-based Systems
- Microsoft Windows 10 2004 for x64-based Systems
- Microsoft Windows 10 1909 for 32-bit Systems
- Microsoft Windows 10 1909 for x64-based Systems
- Microsoft Windows 10 1909 for ARM64-based Systems
- Microsoft Windows 10 20H2 for 32-bit Systems
- Microsoft Windows 10 20H2 for ARM64-based Systems
- Microsoft Windows 10 20H2 for x64-based Systems
- Microsoft Windows Server (Server Core installation) 2019
- Microsoft Windows Server (Server Core installation) 2004
- Microsoft Windows Server (Server Core installation) 20H2
- Microsoft Windows Server (Server Core installation) 2016
- Microsoft Windows Server (Server Core installation) 2012 R2
- Microsoft Windows Server (Server Core installation) 2012
- Microsoft Windows Server for X64-based systems 2008 R2 SP1
- Microsoft Windows Server for X64-based systems (Server Core installation) 2008 SP2
- Microsoft Windows Server for 32-bit systems (Server Core installation) 2008 SP2
- Microsoft Windows Server for 32-bit systems 2008 SP2
- Microsoft Windows Server for X64-based systems (Server Core installation) 2008 R2 SP1
- Microsoft Windows 10 21H1 for 32-bit Systems
- Microsoft Windows 10 21H1 for ARM64-based Systems
- Microsoft Windows 10 21H1 for x64-based Systems
- Microsoft Windows Server 2022
- Microsoft Windows Server (Server Core installation) 2022
- Microsoft Windows Server for X64-based systems 2008 SP2
- Microsoft Windows 11 x32
- Microsoft Windows 11 x64
- Microsoft Windows 11 ARM64
Remediation
Use Microsoft Automatic Update to apply the appropriate patch for your system, or the Microsoft Security Update Guide to search for available patches.
