Known Exploited Vulnerabilities Catalog

For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild. Organizations should use the KEV catalog as an input to their vulnerability management prioritization framework.

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Showing 1 - 20 of 31
Citrix | NetScaler ADC and Gateway

CVE-2025-6543

Citrix NetScaler ADC and Gateway Buffer Overflow Vulnerability: Citrix NetScaler ADC and Gateway contain a buffer overflow vulnerability leading to unintended control flow and Denial of Service. NetScaler must be configured as Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server.

Related CWE: CWE-119

Known To Be Used in Ransomware Campaigns? Unknown

Action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
  • Date Added: 2025-06-30
  • Due Date: 2025-07-21
Additional Notes
https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX694788 ; https://www.netscaler.com/blog/news/netscaler-critical-security-updates-for-cve-2025-6543-and-cve-2025-5777/ ; https://nvd.nist.gov/vuln/detail/CVE-2025-6543
SonicWall | SMA100 Appliances

CVE-2023-44221

SonicWall SMA100 Appliances OS Command Injection Vulnerability: SonicWall SMA100 appliances contain an OS command injection vulnerability in the SSL-VPN management interface that allows a remote, authenticated attacker with administrative privilege to inject arbitrary commands as a 'nobody' user.

Related CWE: CWE-78

Known To Be Used in Ransomware Campaigns? Unknown

Action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
  • Date Added: 2025-05-01
  • Due Date: 2025-05-22
Additional Notes
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2023-0018 ; https://nvd.nist.gov/vuln/detail/CVE-2023-44221
SonicWall | SonicOS

CVE-2024-53704

SonicWall SonicOS SSLVPN Improper Authentication Vulnerability: SonicWall SonicOS contains an improper authentication vulnerability in the SSLVPN authentication mechanism that allows a remote attacker to bypass authentication.

Related CWE: CWE-287

Known To Be Used in Ransomware Campaigns? Unknown

Action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
  • Date Added: 2025-02-18
  • Due Date: 2025-03-11
Additional Notes
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2025-0003 ; https://nvd.nist.gov/vuln/detail/CVE-2024-53704
Array Networks | AG/vxAG ArrayOS

CVE-2023-28461

Array Networks AG and vxAG ArrayOS Missing Authentication for Critical Function Vulnerability: Array Networks AG and vxAG ArrayOS contain a missing authentication for critical function vulnerability that allows an attacker to read local files and execute code on the SSL VPN gateway.

Related CWE: CWE-306

Known To Be Used in Ransomware Campaigns? Known

Action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
  • Date Added: 2024-11-25
  • Due Date: 2024-12-16
Additional Notes
https://support.arraynetworks.net/prx/001/http/supportportal.arraynetworks.net/documentation/FieldNotice/Array_Networks_Security_Advisory_for_Remote_Code_Execution_Vulnerability_AG.pdf ; https://nvd.nist.gov/vuln/detail/CVE-2023-28461
Palo Alto Networks | PAN-OS

CVE-2024-9474

Palo Alto Networks PAN-OS Management Interface OS Command Injection Vulnerability: Palo Alto Networks PAN-OS contains an OS command injection vulnerability that allows for privilege escalation through the web-based management interface for several PAN products, including firewalls and VPN concentrators.

Related CWE: CWE-77

Known To Be Used in Ransomware Campaigns? Unknown

Action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. Additionally, the management interfaces for affected devices should not be exposed to untrusted networks, including the internet.
  • Date Added: 2024-11-18
  • Due Date: 2024-12-09
Additional Notes
https://security.paloaltonetworks.com/CVE-2024-9474 ; https://nvd.nist.gov/vuln/detail/CVE-2024-9474
Palo Alto Networks | PAN-OS

CVE-2024-0012

Palo Alto Networks PAN-OS Management Interface Authentication Bypass Vulnerability: Palo Alto Networks PAN-OS contains an authentication bypass vulnerability in the web-based management interface for several PAN-OS products, including firewalls and VPN concentrators.

Related CWE: CWE-306

Known To Be Used in Ransomware Campaigns? Known

Action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. Additionally, management interface for affected devices should not be exposed to untrusted networks, including the internet.
  • Date Added: 2024-11-18
  • Due Date: 2024-12-09
Additional Notes
https://security.paloaltonetworks.com/CVE-2024-0012 ; https://nvd.nist.gov/vuln/detail/CVE-2024-0012
Cisco | Adaptive Security Appliance (ASA)

CVE-2014-2120

Cisco Adaptive Security Appliance (ASA) Cross-Site Scripting (XSS) Vulnerability: Cisco Adaptive Security Appliance (ASA) contains a cross-site scripting (XSS) vulnerability in the WebVPN login page. This vulnerability allows remote attackers to inject arbitrary web script or HTML via an unspecified parameter.

Related CWE: CWE-79

Known To Be Used in Ransomware Campaigns? Unknown

Action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
  • Date Added: 2024-11-12
  • Due Date: 2024-12-03
Additional Notes
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-CVE-2014-2120 ; https://nvd.nist.gov/vuln/detail/CVE-2014-2120
Cisco | Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)

CVE-2024-20481

Cisco ASA and FTD Denial-of-Service Vulnerability: Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) contain a missing release of resource after effective lifetime vulnerability that could allow an unauthenticated, remote attacker to cause a denial-of-service (DoS) of the RAVPN service.

Related CWE: CWE-772

Known To Be Used in Ransomware Campaigns? Unknown

Action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
  • Date Added: 2024-10-24
  • Due Date: 2024-11-14
Additional Notes
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-bf-dos-vDZhLqrW ; https://nvd.nist.gov/vuln/detail/CVE-2024-20481
Check Point | Quantum Security Gateways

CVE-2024-24919

Check Point Quantum Security Gateways Information Disclosure Vulnerability: Check Point Quantum Security Gateways contain an unspecified information disclosure vulnerability. The vulnerability potentially allows an attacker to access information on Gateways connected to the internet, with IPSec VPN, Remote Access VPN or Mobile Access enabled. This issue affects several product lines from Check Point, including CloudGuard Network, Quantum Scalable Chassis, Quantum Security Gateways, and Quantum Spark Appliances.

Related CWE: CWE-200

Known To Be Used in Ransomware Campaigns? Known

Action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
  • Date Added: 2024-05-30
  • Due Date: 2024-06-20
Additional Notes
https://support.checkpoint.com/results/sk/sk182336 ; https://nvd.nist.gov/vuln/detail/CVE-2024-24919
Cisco | Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)

CVE-2020-3259

Cisco ASA and FTD Information Disclosure Vulnerability: Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) contain an information disclosure vulnerability. An attacker could retrieve memory contents on an affected device, which could lead to the disclosure of confidential information due to a buffer tracking issue when the software parses invalid URLs that are requested from the web services interface. This vulnerability affects only specific AnyConnect and WebVPN configurations.

Related CWE: CWE-200

Known To Be Used in Ransomware Campaigns? Known

Action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
  • Date Added: 2024-02-15
  • Due Date: 2024-03-07
Additional Notes
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-info-disclose-9eJtycMB; https://nvd.nist.gov/vuln/detail/CVE-2020-3259
Citrix | NetScaler ADC and NetScaler Gateway

CVE-2023-6549

Citrix NetScaler ADC and NetScaler Gateway Buffer Overflow Vulnerability: Citrix NetScaler ADC and NetScaler Gateway contain a buffer overflow vulnerability that allows for a denial-of-service when configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or AAA virtual server.

Related CWE: CWE-119

Known To Be Used in Ransomware Campaigns? Unknown

Action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
  • Date Added: 2024-01-17
  • Due Date: 2024-02-07
Additional Notes
https://support.citrix.com/article/CTX584986/netscaler-adc-and-netscaler-gateway-security-bulletin-for-cve20236548-and-cve20236549; https://nvd.nist.gov/vuln/detail/CVE-2023-6549
Citrix | NetScaler ADC and NetScaler Gateway

CVE-2023-4966

Citrix NetScaler ADC and NetScaler Gateway Buffer Overflow Vulnerability: Citrix NetScaler ADC and NetScaler Gateway contain a buffer overflow vulnerability that allows for sensitive information disclosure when configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or AAA virtual server.

Related CWE: CWE-119

Known To Be Used in Ransomware Campaigns? Known

Action: Apply mitigations and kill all active and persistent sessions per vendor instructions [https://www.netscaler.com/blog/news/cve-2023-4966-critical-security-update-now-available-for-netscaler-adc-and-netscaler-gateway/] OR discontinue use of the product if mitigations are unavailable.
  • Date Added: 2023-10-18
  • Due Date: 2023-11-08
Additional Notes
https://www.netscaler.com/blog/news/cve-2023-4966-critical-security-update-now-available-for-netscaler-adc-and-netscaler-gateway/, https://support.citrix.com/article/CTX579459/netscaler-adc-and-netscaler-gateway-security-bulletin-for-cve20234966-and-cve20234967 ; https://nvd.nist.gov/vuln/detail/CVE-2023-4966
Cisco | IOS and IOS XE

CVE-2023-20109

Cisco IOS and IOS XE Group Encrypted Transport VPN Out-of-Bounds Write Vulnerability: Cisco IOS and IOS XE contain an out-of-bounds write vulnerability in the Group Encrypted Transport VPN (GET VPN) feature that could allow an authenticated, remote attacker who has administrative control of either a group member or a key server to execute malicious code or cause a device to crash.

Related CWE: CWE-787

Known To Be Used in Ransomware Campaigns? Unknown

Action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
  • Date Added: 2023-10-10
  • Due Date: 2023-10-31
Additional Notes
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-getvpn-rce-g8qR68sx; https://nvd.nist.gov/vuln/detail/CVE-2023-20109
Cisco | Adaptive Security Appliance and Firepower Threat Defense

CVE-2023-20269

Cisco Adaptive Security Appliance and Firepower Threat Defense Unauthorized Access Vulnerability: Cisco Adaptive Security Appliance and Firepower Threat Defense contain an unauthorized access vulnerability that could allow an unauthenticated, remote attacker to conduct a brute force attack in an attempt to identify valid username and password combinations or establish a clientless SSL VPN session with an unauthorized user.

Related CWE: CWE-288

Known To Be Used in Ransomware Campaigns? Known

Action: Apply mitigations per vendor instructions for group-lock and vpn-simultaneous-logins or discontinue use of the product for unsupported devices.
  • Date Added: 2023-09-13
  • Due Date: 2023-10-04
Additional Notes
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ravpn-auth-8LyfCkeC; https://nvd.nist.gov/vuln/detail/CVE-2023-20269
Fortinet | FortiOS and FortiProxy SSL-VPN

CVE-2023-27997

Fortinet FortiOS and FortiProxy SSL-VPN Heap-Based Buffer Overflow Vulnerability: Fortinet FortiOS and FortiProxy SSL-VPN contain a heap-based buffer overflow vulnerability which can allow an unauthenticated, remote attacker to execute code or commands via specifically crafted requests.

Related CWE: CWE-122

Known To Be Used in Ransomware Campaigns? Known

Action: Apply updates per vendor instructions.
  • Date Added: 2023-06-13
  • Due Date: 2023-07-04
Additional Notes
https://www.fortiguard.com/psirt/FG-IR-23-097; https://nvd.nist.gov/vuln/detail/CVE-2023-27997
Zyxel | Multiple Firewalls

CVE-2023-33009

Zyxel Multiple Firewalls Buffer Overflow Vulnerability: Zyxel ATP, USG FLEX, USG FLEX 50(W), USG20(W)-VPN, VPN, and ZyWALL/USG firewalls contain a buffer overflow vulnerability in the notification function that could allow an unauthenticated attacker to cause denial-of-service (DoS) conditions and remote code execution on an affected device.

Related CWE: CWE-120

Known To Be Used in Ransomware Campaigns? Unknown

Action: Apply updates per vendor instructions.
  • Date Added: 2023-06-05
  • Due Date: 2023-06-26
Additional Notes
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-buffer-overflow-vulnerabilities-of-firewalls; https://nvd.nist.gov/vuln/detail/CVE-2023-33009
Zyxel | Multiple Firewalls

CVE-2023-33010

Zyxel Multiple Firewalls Buffer Overflow Vulnerability: Zyxel ATP, USG FLEX, USG FLEX 50(W), USG20(W)-VPN, VPN, and ZyWALL/USG firewalls contain a buffer overflow vulnerability in the ID processing function that could allow an unauthenticated attacker to cause denial-of-service (DoS) conditions and remote code execution on an affected device.

Related CWE: CWE-120

Known To Be Used in Ransomware Campaigns? Unknown

Action: Apply updates per vendor instructions.
  • Date Added: 2023-06-05
  • Due Date: 2023-06-26
Additional Notes
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-buffer-overflow-vulnerabilities-of-firewalls; https://nvd.nist.gov/vuln/detail/CVE-2023-33010
Zyxel | Multiple Firewalls

CVE-2023-28771

Zyxel Multiple Firewalls OS Command Injection Vulnerability: Zyxel ATP, USG FLEX, VPN, and ZyWALL/USG firewalls allow for improper error message handling which could allow an unauthenticated attacker to execute OS commands remotely by sending crafted packets to an affected device.

Related CWE: CWE-78

Known To Be Used in Ransomware Campaigns? Unknown

Action: Apply updates per vendor instructions.
  • Date Added: 2023-05-31
  • Due Date: 2023-06-21
Additional Notes
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-remote-command-injection-vulnerability-of-firewalls; https://nvd.nist.gov/vuln/detail/CVE-2023-28771
Fortinet | FortiOS

CVE-2022-42475

Fortinet FortiOS Heap-Based Buffer Overflow Vulnerability: Multiple versions of Fortinet FortiOS SSL-VPN contain a heap-based buffer overflow vulnerability which can allow an unauthenticated, remote attacker to execute arbitrary code or commands via specifically crafted requests.

Related CWE: CWE-197

Known To Be Used in Ransomware Campaigns? Known

Action: Apply updates per vendor instructions.
  • Date Added: 2022-12-13
  • Due Date: 2023-01-03
Additional Notes
https://www.fortiguard.com/psirt/FG-IR-22-398; https://nvd.nist.gov/vuln/detail/CVE-2022-42475
Cisco | VPN Routers

CVE-2018-0125

Cisco VPN Routers Remote Code Execution Vulnerability: A vulnerability in the web interface of the Cisco VPN Routers could allow an unauthenticated, remote attacker to execute arbitrary code as root and gain full control of an affected system.

Related CWE: CWE-20

Known To Be Used in Ransomware Campaigns? Unknown

Action: Apply updates per vendor instructions.
  • Date Added: 2022-03-25
  • Due Date: 2022-04-15
Additional Notes
https://nvd.nist.gov/vuln/detail/CVE-2018-0125

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