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<< Back VID 26861 Severity 40 Port 139,445 Protocol TCP Class SMB Detailed Description Microsoft Security Update for November 2021 is not installed. The remote Windows host is missing a security update. It is, therefore, affected by multiple vulnerabilities - An elevation of privilege vulnerability. An attacker can exploit this to gain elevated privileges. (CVE-2021-36957, CVE-2021-41366, CVE-2021-41367, CVE-2021-41370, CVE-2021-41377, CVE-2021-41379, CVE-2021-42277, CVE-2021-42280, CVE-2021-42283, CVE-2021-42285, CVE-2021-42286) - A remote code execution vulnerability. An attacker can exploit this to bypass authentication and execute unauthorized arbitrary commands. (CVE-2021-26443, CVE-2021-38666, CVE-2021-41378, CVE-2021-42275, CVE-2021-42276, CVE-2021-42279) - An information disclosure vulnerability. An attacker can exploit this to disclose potentially sensitive information. (CVE-2021-38631, CVE-2021-38665, CVE-2021-41371) - A security feature bypass vulnerability exists. An attacker can exploit this and bypass the security feature and perform unauthorized actions compromising the integrity of the system/application. (CVE-2021-42288) - A denial of service (DoS) vulnerability. An attacker can exploit this issue to cause the affected component to deny system or application services. (CVE-2021-41356, CVE-2021-42274, CVE-2021-42284) * Note: This check requires an account with administrative privileges which can log into the host to scan. Absence of this condition will result in the check not being performed and a False Negative for all vulnerable hosts. * References: https://support.microsoft.com/en-us/help/4009469 https://support.microsoft.com/en-us/help/4009470 https://support.microsoft.com/en-us/help/4009471 https://support.microsoft.com/en-us/help/4000825 * Platforms Affected: Windows Server 2008 R2 SP1 Windows Server 2008 R2 x64 SP1 Windows 8.1 Windows Server 2012 Windows Server 2012 R2 Windows 10 Windows Server 2016 Recommendation Apply the appropriate patch for your system, as listed in Microsoft Security Bulletin November 2021 Microsoft security update at https://support.microsoft.com/en-us/help/4009469 https://support.microsoft.com/en-us/help/4009470 https://support.microsoft.com/en-us/help/4009471 https://support.microsoft.com/en-us/help/4000825 -- OR -- Patches for Windows platforms are also available from the Microsoft Windows Update Web site, http://windowsupdate.microsoft.com. Windows Update detects what version of Windows you are running and offers the appropriate patch. Related URL CVE-2021-26443,CVE-2021-36957,CVE-2021-38631,CVE-2021-38665,CVE-2021-38666,CVE-2021-41351,CVE-2021-41356,CVE-2021-41366,CVE-2021-41367 (CVE) Related URL (SecurityFocus) Related URL (ISS)