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CyberSigur / Security Intelligence

Known exploited vulnerabilities

Browse CISA's Known Exploited Vulnerabilities catalog. Search by CVE, vendor, or product. Information is published by the US Cybersecurity and Infrastructure Security Agency.

Official CISA source ↗CISA updated: 2026-10-30

1,766 vulnerabilities · Page 84 of 89

CVE-2021-1498

Cisco HyperFlex HX Data Platform Command Injection Vulnerability

Cisco · HyperFlex HX · Added: 2021-11-03

Cisco HyperFlex HX Installer Virtual Machine contains an insufficient input validation vulnerability which could allow an attacker to execute commands on an affected device as the tomcat8 user.

CISA recommended action

Apply updates per vendor instructions.

CVE details ↗
CVE-2021-1647

Microsoft Defender Remote Code Execution Vulnerability

Microsoft · Defender · Added: 2021-11-03

Microsoft Defender contains an unspecified vulnerability that allows for remote code execution.

CISA recommended action

Apply updates per vendor instructions.

CVE details ↗
CVE-2021-1675Confirmed ransomware campaign use

Microsoft Windows Print Spooler Remote Code Execution Vulnerability

Microsoft · Windows · Added: 2021-11-03

Microsoft Windows Print Spooler contains an unspecified vulnerability that allows for remote code execution.

CISA recommended action

Apply updates per vendor instructions.

CVE details ↗
CVE-2021-1732Confirmed ransomware campaign use

Microsoft Win32k Privilege Escalation Vulnerability

Microsoft · Win32k · Added: 2021-11-03

Microsoft Win32k contains an unspecified vulnerability that allows for privilege escalation.

CISA recommended action

Apply updates per vendor instructions.

CVE details ↗
CVE-2021-1782

Apple Multiple Products Race Condition Vulnerability

Apple · Multiple Products · Added: 2021-11-03

Apple iOS, iPadOs, macOS, watchOS, and tvOS contain a race condition vulnerability that may allow a malicious application to elevate privileges.

CISA recommended action

Apply updates per vendor instructions.

CVE details ↗
CVE-2021-1870

Apple iOS, iPadOS, and macOS WebKit Remote Code Execution Vulnerability

Apple · iOS, iPadOS, and macOS · Added: 2021-11-03

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.

CISA recommended action

Apply updates per vendor instructions.

CVE details ↗
CVE-2021-1871

Apple iOS, iPadOS, and macOS WebKit Remote Code Execution Vulnerability

Apple · iOS, iPadOS, and macOS · Added: 2021-11-03

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.

CISA recommended action

Apply updates per vendor instructions.

CVE details ↗
CVE-2021-1879

Apple iOS, iPadOS, and watchOS WebKit Cross-Site Scripting (XSS) Vulnerability

Apple · iOS, iPadOS, and watchOS · Added: 2021-11-03

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.

CISA recommended action

Apply updates per vendor instructions.

CVE details ↗
CVE-2021-1905

Qualcomm Multiple Chipsets Use-After-Free Vulnerability

Qualcomm · Multiple Chipsets · Added: 2021-11-03

Multiple Qualcomm Chipsets contain a use after free vulnerability due to improper handling of memory mapping of multiple processes simultaneously.

CISA recommended action

Apply updates per vendor instructions.

CVE details ↗
CVE-2021-1906

Qualcomm Multiple Chipsets Detection of Error Condition Without Action Vulnerability

Qualcomm · Multiple Chipsets · Added: 2021-11-03

Multiple Qualcomm chipsets contain a detection of error condition without action vulnerability when improper handling of address deregistration on failure can lead to new GPU address allocation failure.

CISA recommended action

Apply updates per vendor instructions.

CVE details ↗
CVE-2021-20016Confirmed ransomware campaign use

SonicWall SSLVPN SMA100 SQL Injection Vulnerability

SonicWall · SSLVPN SMA100 · Added: 2021-11-03

SonicWall SSLVPN SMA100 contains a SQL injection vulnerability that allows remote exploitation for credential access by an unauthenticated attacker.

CISA recommended action

Apply updates per vendor instructions.

CVE details ↗
CVE-2021-20021Confirmed ransomware campaign use

SonicWall Email Security Improper Privilege Management Vulnerability

SonicWall · SonicWall Email Security · Added: 2021-11-03

SonicWall Email Security contains an improper privilege management vulnerability that allows an attacker to create an administrative account by sending a crafted HTTP request to the remote host. This vulnerability has known usage in a SonicWall Email Security exploit chain along with CVE-2021-20022 and CVE-2021-20023 to achieve privilege escalation.

CISA recommended action

Apply updates per vendor instructions.

CVE details ↗
CVE-2021-20022Confirmed ransomware campaign use

SonicWall Email Security Unrestricted Upload of File Vulnerability

SonicWall · SonicWall Email Security · Added: 2021-11-03

SonicWall Email Security contains an unrestricted upload of file with dangerous type vulnerability that allows a post-authenticated attacker to upload a file to the remote host. This vulnerability has known usage in a SonicWall Email Security exploit chain along with CVE-2021-20021 and CVE-2021-20023 to achieve privilege escalation.

CISA recommended action

Apply updates per vendor instructions.

CVE details ↗
CVE-2021-20023Confirmed ransomware campaign use

SonicWall Email Security Path Traversal Vulnerability

SonicWall · SonicWall Email Security · Added: 2021-11-03

SonicWall Email Security contains a path traversal vulnerability that allows a post-authenticated attacker to read files on the remote host. This vulnerability has known usage in a SonicWall Email Security exploit chain along with CVE-2021-20021 and CVE-2021-20022 to achieve privilege escalation.

CISA recommended action

Apply updates per vendor instructions.

CVE details ↗
CVE-2021-20090

Arcadyan Buffalo Firmware Path Traversal Vulnerability

Arcadyan · Buffalo Firmware · Added: 2021-11-03

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.

CISA recommended action

Apply updates per vendor instructions.

CVE details ↗
CVE-2021-21017

Adobe Acrobat and Reader Heap-based Buffer Overflow Vulnerability

Adobe · Acrobat and Reader · Added: 2021-11-03

Acrobat Acrobat and Reader contain a heap-based buffer overflow vulnerability that could allow an unauthenticated attacker to achieve code execution in the context of the current user.

CISA recommended action

Apply updates per vendor instructions.

CVE details ↗
CVE-2021-21148

Google Chromium V8 Heap Buffer Overflow Vulnerability

Google · Chromium V8 · Added: 2021-11-03

Google Chromium V8 Engine contains a heap buffer overflow vulnerability that allows a remote attacker to potentially exploit heap corruption via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.

CISA recommended action

Apply updates per vendor instructions.

CVE details ↗
CVE-2021-21166

Google Chromium Race Condition Vulnerability

Google · Chromium · Added: 2021-11-03

Google Chromium contains a race condition vulnerability that allows a remote attacker to potentially exploit heap corruption via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.

CISA recommended action

Apply updates per vendor instructions.

CVE details ↗
CVE-2021-21193

Google Chromium Blink Use-After-Free Vulnerability

Google · Chromium Blink · Added: 2021-11-03

Google Chromium Blink contains a use-after-free vulnerability that allows a remote attacker to potentially exploit heap corruption via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.

CISA recommended action

Apply updates per vendor instructions.

CVE details ↗
CVE-2021-21206

Google Chromium Blink Use-After-Free Vulnerability

Google · Chromium Blink · Added: 2021-11-03

Google Chromium Blink contains a use-after-free vulnerability that allows a remote attacker to potentially exploit heap corruption via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.

CISA recommended action

Apply updates per vendor instructions.

CVE details ↗
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