CISA Known Exploited Vulnerabilities (KEV)
To support the cybersecurity community and help network defenders stay ahead of active threat activity, CISA publishes cisa alert today updates and maintains the authoritative catalog of known exploited vulnerabilities. This KEV database highlights vulnerabilities that have been actively used in real-world attacks, making it an essential resource for security teams aiming to strengthen their defenses.
Organizations should incorporate the KEV catalog into their vulnerability management prioritization framework to ensure they address high-risk issues efficiently and stay aligned with the latest threat intelligence. With frequent updates — including entries marked as cisa kev added today — the catalog enables teams to react quickly to emerging exploitation trends. To streamline monitoring and improve response time, CVEfeed.io provides the freshest CISA KEV additions, delivering real-time visibility into newly identified exploited vulnerabilities and helping organizations maintain accurate, up-to-date security postures.
9.3
CVE-2021-30807 - Apple Multiple Products Memory Corruption Vulnerability -
Action Due Nov 17, 2021 Target Vendor : Apple
Description : Apple iOS, iPadOS, macOS, and watchOS IOMobileFrameBuffer contain a memory corruption vulnerability which may allow an application to execute code with kernel privileges.
Action : Apply updates per vendor instructions.
Known To Be Used in Ransomware Campaigns? : Unknown
Notes : https://nvd.nist.gov/vuln/detail/CVE-2021-30807
7.1
CVE-2020-27950 - Apple Multiple Products Memory Initialization Vulnerability -
Action Due May 03, 2022 Target Vendor : Apple
Description : Apple iOS, iPadOS, macOS, and watchOS contain a memory initialization vulnerability that may allow a malicious application to disclose kernel memory.
Action : Apply updates per vendor instructions.
Known To Be Used in Ransomware Campaigns? : Unknown
Notes : https://nvd.nist.gov/vuln/detail/CVE-2020-27950
9.3
CVE-2020-27932 - Apple Multiple Products Type Confusion Vulnerability -
Action Due May 03, 2022 Target Vendor : Apple
Description : Apple iOS, iPadOS, macOS, and watchOS contain a type confusion vulnerability that may allow a malicious application to execute code with kernel privileges.
Action : Apply updates per vendor instructions.
Known To Be Used in Ransomware Campaigns? : Unknown
Notes : https://nvd.nist.gov/vuln/detail/CVE-2020-27932
8.8
CVE-2020-9818 - Apple iOS, iPadOS, and watchOS Out-of-Bounds Write Vulnerability -
Action Due May 03, 2022 Target Vendor : Apple
Description : Apple iOS, iPadOS, and watchOS Mail contains an out-of-bounds write vulnerability which may allow memory modification or application termination when processing a maliciously crafted mail message.
Action : Apply updates per vendor instructions.
Known To Be Used in Ransomware Campaigns? : Unknown
Notes : https://nvd.nist.gov/vuln/detail/CVE-2020-9818
4.3
CVE-2020-9819 - Apple iOS, iPadOS, and watchOS Memory Corruption Vulnerability -
Action Due May 03, 2022 Target Vendor : Apple
Description : Apple iOS, iPadOS, and watchOS Mail contains a memory corruption vulnerability that may allow heap corruption when processing a maliciously crafted mail message.
Action : Apply updates per vendor instructions.
Known To Be Used in Ransomware Campaigns? : Unknown
Notes : https://nvd.nist.gov/vuln/detail/CVE-2020-9819
7.0
CVE-2021-1782 - Apple Multiple Products Race Condition Vulnerability -
Action Due Nov 17, 2021 Target Vendor : Apple
Description : Apple iOS, iPadOs, macOS, watchOS, and tvOS contain a race condition vulnerability that may allow a malicious application to elevate privileges.
Action : Apply updates per vendor instructions.
Known To Be Used in Ransomware Campaigns? : Unknown
Notes : https://nvd.nist.gov/vuln/detail/CVE-2021-1782
9.8
CVE-2021-1870 - Apple iOS, iPadOS, and macOS WebKit Remote Code Execution Vulnerability -
Action Due Nov 17, 2021 Target Vendor : Apple
Description : Apple iOS, iPadOS, and macOS WebKit contain an unspecified logic vulnerability that allows a remote attacker to execute code. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari and non-Apple products which rely on WebKit for HTML processing.
Action : Apply updates per vendor instructions.
Known To Be Used in Ransomware Campaigns? : Unknown
Notes : https://nvd.nist.gov/vuln/detail/CVE-2021-1870
6.1
CVE-2021-1879 - Apple iOS, iPadOS, and watchOS WebKit Cross-Site Scripting (XSS) Vulnerability -
Action Due Nov 17, 2021 Target Vendor : Apple
Description : Apple iOS, iPadOS, and watchOS WebKit contain an unspecified vulnerability that allows for universal cross-site scripting (XSS) when processing maliciously crafted web content. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari and non-Apple products which rely on WebKit for HTML processing.
Action : Apply updates per vendor instructions.
Known To Be Used in Ransomware Campaigns? : Unknown
Notes : https://nvd.nist.gov/vuln/detail/CVE-2021-1879
8.8
CVE-2021-30666 - Apple iOS WebKit Buffer Overflow Vulnerability -
Action Due Nov 17, 2021 Target Vendor : Apple
Description : Apple iOS WebKit contains a buffer-overflow vulnerability that leads to code execution when processing maliciously crafted web content. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari and non-Apple products which rely on WebKit for HTML processing.
Action : Apply updates per vendor instructions.
Known To Be Used in Ransomware Campaigns? : Unknown
Notes : https://nvd.nist.gov/vuln/detail/CVE-2021-30666
7.8
CVE-2021-30713 - Apple macOS Unspecified Vulnerability -
Action Due Nov 17, 2021 Target Vendor : Apple
Description : Apple macOS Transparency, Consent, and Control (TCC) contains an unspecified permissions issue which may allow a malicious application to bypass privacy preferences.
Action : Apply updates per vendor instructions.
Known To Be Used in Ransomware Campaigns? : Unknown
Notes : https://nvd.nist.gov/vuln/detail/CVE-2021-30713
5.5
CVE-2021-30657 - Apple macOS Unspecified Vulnerability -
Action Due Nov 17, 2021 Target Vendor : Apple
Description : Apple macOS contains an unspecified logic issue in System Preferences that may allow a malicious application to bypass Gatekeeper checks.
Action : Apply updates per vendor instructions.
Known To Be Used in Ransomware Campaigns? : Unknown
Notes : https://nvd.nist.gov/vuln/detail/CVE-2021-30657
8.8
CVE-2021-33742 - Microsoft Windows MSHTML Platform Remote Code Execution Vulnerability -
Action Due Nov 17, 2021 Target Vendor : Microsoft
Description : Microsoft Windows MSHTML Platform contains an unspecified vulnerability that allows for remote code execution.
Action : Apply updates per vendor instructions.
Known To Be Used in Ransomware Campaigns? : Unknown
Notes : https://nvd.nist.gov/vuln/detail/CVE-2021-33742
9.3
CVE-2021-30869 - Apple iOS, iPadOS, and macOS Type Confusion Vulnerability -
Action Due Nov 17, 2021 Target Vendor : Apple
Description : Apple iOS, iPadOS, and macOS contain a type confusion vulnerability in the XNU which may allow a malicious application to execute code with kernel privileges.
Action : Apply updates per vendor instructions.
Known To Be Used in Ransomware Campaigns? : Unknown
Notes : https://nvd.nist.gov/vuln/detail/CVE-2021-30869
7.8
CVE-2020-9859 - Apple Multiple Products Code Execution Vulnerability -
Action Due May 03, 2022 Target Vendor : Apple
Description : Apple iOS, iPadOS, macOS, watchOS, and tvOS contain an unspecified vulnerability that may allow an application to execute code with kernel privileges.
Action : Apply updates per vendor instructions.
Known To Be Used in Ransomware Campaigns? : Unknown
Notes : https://nvd.nist.gov/vuln/detail/CVE-2020-9859
9.8
CVE-2021-20090 - Arcadyan Buffalo Firmware Path Traversal Vulnerability -
Action Due Nov 17, 2021 Target Vendor : Arcadyan
Description : Arcadyan Buffalo firmware contains a path traversal vulnerability that could allow unauthenticated, remote attackers to bypass authentication and access sensitive information. This vulnerability affects multiple routers across several different vendors.
Action : Apply updates per vendor instructions.
Known To Be Used in Ransomware Campaigns? : Unknown
Notes : https://nvd.nist.gov/vuln/detail/CVE-2021-20090
5.5
CVE-2021-27562 - Arm Trusted Firmware Out-of-Bounds Write Vulnerability -
Action Due Nov 17, 2021 Target Vendor : Arm
Description : Arm Trusted Firmware contains an out-of-bounds write vulnerability allowing the non-secure (NS) world to trigger a system halt, overwrite secure data, or print out secure data when calling secure functions under the non-secure processing environment (NSPE) handler mode. This vulnerability affects Yealink Device Management servers.
Action : Apply updates per vendor instructions.
Known To Be Used in Ransomware Campaigns? : Unknown
Notes : https://nvd.nist.gov/vuln/detail/CVE-2021-27562
9.0
CVE-2021-28664 - Arm Mali Graphics Processing Unit (GPU) Unspecified Vulnerability -
Action Due Nov 17, 2021 Target Vendor : Arm
Description : Arm Mali Graphics Processing Unit (GPU) kernel driver contains an unspecified vulnerability that may allow a non-privileged user to gain write access to read-only memory, gain root privilege, corrupt memory, and modify the memory of other processes.
Action : Apply updates per vendor instructions.
Known To Be Used in Ransomware Campaigns? : Unknown
Notes : https://nvd.nist.gov/vuln/detail/CVE-2021-28664
9.0
CVE-2021-28663 - Arm Mali Graphics Processing Unit (GPU) Use-After-Free Vulnerability -
Action Due Nov 17, 2021 Target Vendor : Arm
Description : Arm Mali Graphics Processing Unit (GPU) kernel driver contains a use-after-free vulnerability that may allow a non-privileged user to make improper operations on GPU memory to gain root privilege, and/or disclose information.
Action : Apply updates per vendor instructions.
Known To Be Used in Ransomware Campaigns? : Unknown
Notes : https://nvd.nist.gov/vuln/detail/CVE-2021-28663
9.8
CVE-2021-26084 - Atlassian Confluence Server and Data Center Object-Graph Navigation Language (OGNL) Injection Vulnerability -
Action Due Nov 17, 2021 Target Vendor : Atlassian
Description : Atlassian Confluence Server and Data Server contain an Object-Graph Navigation Language (OGNL) injection vulnerability that may allow an unauthenticated attacker to execute code.
Action : Apply updates per vendor instructions.
Known To Be Used in Ransomware Campaigns? : Known
Notes : https://nvd.nist.gov/vuln/detail/CVE-2021-26084
9.8
CVE-2019-11580 - Atlassian Crowd and Crowd Data Center Remote Code Execution Vulnerability -
Action Due May 03, 2022 Target Vendor : Atlassian
Description : Atlassian Crowd and Crowd Data Center contain a remote code execution vulnerability resulting from a pdkinstall development plugin being incorrectly enabled in release builds.
Action : Apply updates per vendor instructions.
Known To Be Used in Ransomware Campaigns? : Unknown
Notes : https://nvd.nist.gov/vuln/detail/CVE-2019-11580