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Exploited vulnerabilities (CISA KEV)

CVEs with exploitation confirmed by CISA (Known Exploited Vulnerabilities), with required actions and deadlines.

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CVE-2021-34448 Medium · 6.8 KEV High · 56 CWE-787 Jul 16, 2021
Microsoft Windows Scripting Engine Memory Corruption Vulnerability
Scripting Engine Memory Corruption Vulnerability
CVE-2021-34523 Critical · 9.0 KEV Urgent · 98 Public exploit Ransomware Jul 14, 2021
Microsoft Exchange Server Privilege Escalation Vulnerability
Microsoft Exchange Server Elevation of Privilege Vulnerability
CVE-2021-34473 Critical · 9.1 KEV Urgent · 100 Public exploit Ransomware CWE-918 Jul 14, 2021
Microsoft Exchange Server Remote Code Execution Vulnerability
Microsoft Exchange Server Remote Code Execution Vulnerability
CVE-2021-33771 High · 7.8 KEV High · 55 Jul 14, 2021
Microsoft Windows Kernel Privilege Escalation Vulnerability
Windows Kernel Elevation of Privilege Vulnerability
CVE-2021-33766 High · 7.3 KEV High · 69 Public exploit Jul 14, 2021
Microsoft Exchange Server Information Disclosure
Microsoft Exchange Server Information Disclosure Vulnerability
CVE-2021-31979 High · 7.8 KEV High · 55 CWE-119 Jul 14, 2021
Microsoft Windows Kernel Privilege Escalation Vulnerability
Windows Kernel Elevation of Privilege Vulnerability
CVE-2021-31196 High · 7.2 KEV High · 59 Jul 14, 2021
Microsoft Exchange Server Information Disclosure Vulnerability
Microsoft Exchange Server Remote Code Execution Vulnerability
CVE-2021-34527 High · 8.8 KEV Urgent · 84 Public exploit Ransomware Jul 2, 2021
Microsoft Windows Print Spooler Remote Code Execution Vulnerability
A remote code execution vulnerability exists when the Windows Print Spooler service improperly performs privileged file operations. An attacker who successfully exploited this vulnerability could run arbitrary code with SYSTEM privileges. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. UPDATE July 7, 2021: The security update for Windows Server 2012, Windows Server 2016 and Windows 10, Version 1607 have been released. Please see the Security Updates table for the applicable update for your system. We recommend that you install these updates immediately. If you are unable to install these updates, see the FAQ and Workaround sections in this CVE for information on how to help protect your system from this vulnerability. In addition to installing the updates, in order to secure your system, you must confirm that the following registry settings are set to 0 (zero) or are not defined (Note: These registry keys do not exist by default, and therefore are already at the secure setting.), also that your Group Policy setting are correct (see FAQ): HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows NT\Printers\PointAndPrint NoWarningNoElevationOnInstall = 0 (DWORD) or not defined (default setting) UpdatePromptSettings = 0 (DWORD) or not defined (default setting) Having NoWarningNoElevationOnInstall set to 1 makes your system vulnerable by design. UPDATE July 6, 2021: Microsoft has completed the investigation and has released security updates to address this vulnerability. Please see the Security Updates table for the applicable update for your system. We recommend that you install these updates immediately. If you are unable to install these updates, see the FAQ and Workaround sections in this CVE for information on how to help protect your system from this vulnerability. See also KB5005010: Restricting installation of new printer drivers after applying the July 6, 2021 updates. Note that the security updates released on and after July 6, 2021 contain protections for CVE-2021-1675 and the additional remote code execution exploit in the Windows Print Spooler service known as “PrintNightmare”, documented in CVE-2021-34527.
CVE-2021-33742 High · 7.5 KEV High · 56 CWE-787 Jun 8, 2021
Microsoft Windows MSHTML Platform Remote Code Execution Vulnerability
Windows MSHTML Platform Remote Code Execution Vulnerability
CVE-2021-33739 High · 8.4 KEV High · 61 Public exploit Jun 8, 2021
Microsoft Desktop Window Manager (DWM) Core Library Privilege Escalation Vulnerability
Microsoft DWM Core Library Elevation of Privilege Vulnerability
CVE-2021-1675 High · 7.8 KEV Urgent · 84 Public exploit Ransomware Jun 8, 2021
Microsoft Windows Print Spooler Remote Code Execution Vulnerability
Windows Print Spooler Remote Code Execution Vulnerability
CVE-2021-31201 Medium · 5.2 KEV High · 51 Jun 8, 2021
Microsoft Enhanced Cryptographic Provider Privilege Escalation Vulnerability
Microsoft Enhanced Cryptographic Provider Elevation of Privilege Vulnerability
CVE-2021-31956 High · 7.8 KEV High · 62 Public exploit CWE-191 Jun 8, 2021
Microsoft Windows NTFS Privilege Escalation Vulnerability
Windows NTFS Elevation of Privilege Vulnerability
CVE-2021-31199 Medium · 5.2 KEV High · 51 Jun 8, 2021
Microsoft Enhanced Cryptographic Provider Privilege Escalation Vulnerability
Microsoft Enhanced Cryptographic Provider Elevation of Privilege Vulnerability
CVE-2021-31955 Medium · 5.5 KEV High · 59 Public exploit CWE-497 Jun 8, 2021
Microsoft Windows Kernel Information Disclosure Vulnerability
Windows Kernel Information Disclosure Vulnerability
CVE-2021-31207 Medium · 6.6 KEV Urgent · 85 Public exploit Ransomware CWE-434 May 11, 2021
Microsoft Exchange Server Security Feature Bypass Vulnerability
Microsoft Exchange Server Security Feature Bypass Vulnerability
CVE-2021-31166 Critical · 9.8 KEV Urgent · 81 Public exploit CWE-416 May 11, 2021
Microsoft HTTP Protocol Stack Remote Code Execution Vulnerability
HTTP Protocol Stack Remote Code Execution Vulnerability
CVE-2021-28310 High · 7.8 KEV High · 61 Public exploit CWE-787 Apr 13, 2021
Microsoft Win32k Privilege Escalation Vulnerability
Win32k Elevation of Privilege Vulnerability
CVE-2021-27085 High · 8.8 KEV High · 55 Mar 11, 2021
Microsoft Internet Explorer Remote Code Execution Vulnerability
Internet Explorer Remote Code Execution Vulnerability
CVE-2021-27059 High · 7.6 KEV High · 55 Mar 11, 2021
Microsoft Office Remote Code Execution Vulnerability
Microsoft Office Remote Code Execution Vulnerability
CVE-2021-26411 High · 8.8 KEV Urgent · 82 Public exploit Ransomware CWE-416 Mar 11, 2021
Microsoft Internet Explorer Memory Corruption Vulnerability
Internet Explorer Memory Corruption Vulnerability
CVE-2021-26857 High · 7.8 KEV Urgent · 82 Public exploit Ransomware CWE-502 Mar 2, 2021
Microsoft Exchange Server Remote Code Execution Vulnerability
Microsoft Exchange Server Remote Code Execution Vulnerability
CVE-2021-27065 High · 7.8 KEV Urgent · 99 Public exploit Ransomware CWE-22 Mar 2, 2021
Microsoft Exchange Server Remote Code Execution Vulnerability
Microsoft Exchange Server Remote Code Execution Vulnerability
CVE-2021-26858 High · 7.8 KEV Urgent · 79 Ransomware Mar 2, 2021
Microsoft Exchange Server Remote Code Execution Vulnerability
Microsoft Exchange Server Remote Code Execution Vulnerability
CVE-2021-26855 Critical · 9.1 KEV Urgent · 100 Public exploit Ransomware CWE-918 Mar 2, 2021
Microsoft Exchange Server Remote Code Execution Vulnerability
Microsoft Exchange Server Remote Code Execution Vulnerability