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Cisco Vulnerabilities

Known Exploited Vulnerabilities catalog entries for Cisco products.

83
CVE Total
19
Critical
5
Ransomware
CVE-2026-20045 HIGH

Cisco Unified Communications Products Code Injection Vulnerability

Cisco Unified Communications Manager
CVSS 8.2
Added Jan 21
CVE-2025-20393 CRITICAL

Cisco Multiple Products Improper Input Validation Vulnerability

Cisco Multiple Products
CVSS 10
Added Dec 17
CVE-2025-20352 HIGH

Cisco IOS and IOS XE Software SNMP Denial of Service and Remote Code Execution Vulnerability

Cisco IOS and IOS XE
CVSS 7.7
Added Sep 29
CVE-2025-20333 CRITICAL

Cisco Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Buffer Overflow Vulnerability

Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense
CVSS 9.9
Added Sep 25
CVE-2025-20362 MEDIUM

Cisco Secure Firewall Adaptive Security (ASA) Appliance and Secure Firewall Threat Defense (FTD) Missing Authorization Vulnerability

Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense
CVSS 6.5
Added Sep 25
CVE-2025-20281 CRITICAL

Cisco Identity Services Engine Injection Vulnerability

Cisco Identity Services Engine
CVSS 10
Added Jul 28
CVE-2025-20337 CRITICAL

Cisco Identity Services Engine Injection Vulnerability

Cisco Identity Services Engine
CVSS 10
Added Jul 28
CVE-2024-20439 CRITICAL

Cisco Smart Licensing Utility Static Credential Vulnerability

Cisco Smart Licensing Utility
CVSS 9.8
Added Mar 31
CVE-2023-20118 MEDIUM

Cisco Small Business RV Series Routers Command Injection Vulnerability

Cisco Small Business RV Series Routers
CVSS 6.5
Added Mar 03
CVE-2014-2120 MEDIUM

Cisco Adaptive Security Appliance (ASA) Cross-Site Scripting (XSS) Vulnerability

Cisco Adaptive Security Appliance (ASA)
CVSS 5.4
Added Nov 12
CVE-2024-20481 MEDIUM

Cisco ASA and FTD Denial-of-Service Vulnerability

Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)
CVSS 5.8
Added Oct 24
CVE-2024-20399 MEDIUM

Cisco NX-OS Command Injection Vulnerability

Cisco NX-OS
CVSS 6
Added Jul 02
CVE-2024-20353 HIGH

Cisco ASA and FTD Denial of Service Vulnerability

Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)
CVSS 8.6
Added Apr 24
CVE-2024-20359 MEDIUM

Cisco ASA and FTD Privilege Escalation Vulnerability

Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)
CVSS 6
Added Apr 24
CVE-2020-3259 HIGH Ransomware

Cisco ASA and FTD Information Disclosure Vulnerability

Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)
CVSS 7.5
Added Feb 15
CVE-2023-20273 HIGH

Cisco IOS XE Web UI Command Injection Vulnerability

Cisco Cisco IOS XE Web UI
CVSS 7.2
Added Oct 23
CVE-2023-20198 CRITICAL

Cisco IOS XE Web UI Privilege Escalation Vulnerability

Cisco IOS XE Web UI
CVSS 10
Added Oct 16
CVE-2023-20109 MEDIUM

Cisco IOS and IOS XE Group Encrypted Transport VPN Out-of-Bounds Write Vulnerability

Cisco IOS and IOS XE
CVSS 6.6
Added Oct 10
CVE-2023-20269 MEDIUM Ransomware

Cisco Adaptive Security Appliance and Firepower Threat Defense Unauthorized Access Vulnerability

Cisco Adaptive Security Appliance and Firepower Threat Defense
CVSS 5
Added Sep 13
CVE-2004-1464 MEDIUM

Cisco IOS Denial-of-Service Vulnerability

Cisco IOS
CVSS 5.9
Added May 19
CVE-2016-6415 HIGH

Cisco IOS, IOS XR, and IOS XE IKEv1 Information Disclosure Vulnerability

Cisco IOS, IOS XR, and IOS XE
CVSS 7.5
Added May 19
CVE-2017-6742 HIGH

Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability

Cisco IOS and IOS XE Software
CVSS 8.8
Added Apr 19
CVE-2020-3153 MEDIUM Ransomware

Cisco AnyConnect Secure Mobility Client for Windows Uncontrolled Search Path Vulnerability

Cisco AnyConnect Secure
CVSS 6.5
Added Oct 24
CVE-2020-3433 HIGH Ransomware

Cisco AnyConnect Secure Mobility Client for Windows DLL Hijacking Vulnerability

Cisco AnyConnect Secure
CVSS 7.8
Added Oct 24
CVE-2019-15271 HIGH

Cisco RV Series Routers Deserialization of Untrusted Data Vulnerability

Cisco RV Series Routers
CVSS 8.8
Added Jun 08
CVE-2016-6366 HIGH

Cisco Adaptive Security Appliance (ASA) SNMP Buffer Overflow Vulnerability

Cisco Adaptive Security Appliance (ASA)
CVSS 8.8
Added May 24
CVE-2016-6367 HIGH

Cisco Adaptive Security Appliance (ASA) CLI Remote Code Execution Vulnerability

Cisco Adaptive Security Appliance (ASA)
CVSS 7.8
Added May 24
CVE-2022-20821 MEDIUM

Cisco IOS XR Open Port Vulnerability

Cisco IOS XR
CVSS 6.5
Added May 23
CVE-2009-2055 MEDIUM

Cisco IOS XR Border Gateway Protocol (BGP) Denial-of-Service Vulnerability

Cisco IOS XR
CVSS 5.9
Added Mar 25
CVE-2010-3035 HIGH

Cisco IOS XR Border Gateway Protocol (BGP) Denial-of-Service Vulnerability

Cisco IOS XR
CVSS 7.5
Added Mar 25
CVE-2015-0666 HIGH

Cisco Prime Data Center Network Manager (DCNM) Directory Traversal Vulnerability

Cisco Prime Data Center Network Manager (DCNM)
CVSS 7.5
Added Mar 25
CVE-2017-3881 CRITICAL

Cisco IOS and IOS XE Remote Code Execution Vulnerability

Cisco IOS and IOS XE
CVSS 9.8
Added Mar 25
CVE-2018-0125 CRITICAL

Cisco VPN Routers Remote Code Execution Vulnerability

Cisco VPN Routers
CVSS 9.8
Added Mar 25
CVE-2018-0147 CRITICAL

Cisco Secure Access Control System Java Deserialization Vulnerability

Cisco Secure Access Control System (ACS)
CVSS 9.8
Added Mar 25
CVE-2017-12231 HIGH

Cisco IOS Software Network Address Translation Denial-of-Service Vulnerability

Cisco IOS software
CVSS 7.5
Added Mar 03
CVE-2017-12232 MEDIUM

Cisco IOS Software for Cisco Integrated Services Routers Denial-of-Service Vulnerability

Cisco IOS software
CVSS 6.5
Added Mar 03
CVE-2017-12233 HIGH

Cisco IOS Software Common Industrial Protocol Request Denial-of-Service Vulnerability

Cisco IOS software
CVSS 7.5
Added Mar 03
CVE-2017-12234 HIGH

Cisco IOS Software Common Industrial Protocol Request Denial-of-Service Vulnerability

Cisco IOS software
CVSS 7.5
Added Mar 03
CVE-2017-12235 HIGH

Cisco IOS Software for Cisco Industrial Ethernet Switches PROFINET Denial-of-Service Vulnerability

Cisco IOS software
CVSS 7.5
Added Mar 03
CVE-2017-12237 HIGH

Cisco IOS and IOS XE Software Internet Key Exchange Denial-of-Service Vulnerability

Cisco IOS and IOS XE Software
CVSS 7.5
Added Mar 03
CVE-2017-12238 MEDIUM

Cisco Catalyst 6800 Series Switches VPLS Denial-of-Service Vulnerability

Cisco Catalyst 6800 Series Switches
CVSS 6.5
Added Mar 03
CVE-2017-12240 CRITICAL

Cisco IOS and IOS XE Software DHCP Remote Code Execution Vulnerability

Cisco IOS and IOS XE Software
CVSS 9.8
Added Mar 03
CVE-2017-12319 MEDIUM

Cisco IOS XE Software Ethernet Virtual Private Network Border Gateway Protocol Denial-of-Service Vulnerability

Cisco IOS XE Software
CVSS 5.9
Added Mar 03
CVE-2017-6627 HIGH

Cisco IOS Software and Cisco IOS XE Software UDP Packet Processing Denial-of-Service Vulnerability

Cisco IOS and IOS XE Software
CVSS 7.5
Added Mar 03
CVE-2017-6663 MEDIUM

Cisco IOS Software and Cisco IOS XE Software Denial-of-Service Vulnerability

Cisco IOS and IOS XE Software
CVSS 6.5
Added Mar 03
CVE-2017-6736 HIGH

Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability

Cisco IOS and IOS XE Software
CVSS 8.8
Added Mar 03
CVE-2017-6737 HIGH

Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability

Cisco IOS and IOS XE Software
CVSS 8.8
Added Mar 03
CVE-2017-6738 HIGH

Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability

Cisco IOS and IOS XE Software
CVSS 8.8
Added Mar 03
CVE-2017-6739 HIGH

Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability

Cisco IOS and IOS XE Software
CVSS 8.8
Added Mar 03
CVE-2017-6740 HIGH

Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability

Cisco IOS and IOS XE Software
CVSS 8.8
Added Mar 03
CVE-2017-6743 HIGH

Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability

Cisco IOS and IOS XE Software
CVSS 8.8
Added Mar 03
CVE-2017-6744 HIGH

Cisco IOS Software SNMP Remote Code Execution Vulnerability

Cisco IOS software
CVSS 8.8
Added Mar 03
CVE-2018-0151 CRITICAL

Cisco IOS Software and Cisco IOS XE Software Quality of Service Remote Code Execution Vulnerability

Cisco IOS and IOS XE Software
CVSS 9.8
Added Mar 03
CVE-2018-0154 HIGH

Cisco IOS Software Integrated Services Module for VPN Denial-of-Service Vulnerability

Cisco IOS Software
CVSS 7.5
Added Mar 03
CVE-2018-0155 HIGH

Cisco Catalyst Bidirectional Forwarding Detection Denial-of-Service Vulnerability

Cisco Catalyst 4500 Series Switches and Cisco Catalyst 4500-X Series Switches
CVSS 8.6
Added Mar 03
CVE-2018-0156 HIGH

Cisco IOS Software and Cisco IOS XE Software Smart Install Denial-of-Service Vulnerability

Cisco IOS Software and Cisco IOS XE Software
CVSS 7.5
Added Mar 03
CVE-2018-0158 HIGH

Cisco IOS and XE Software Internet Key Exchange Memory Leak Vulnerability

Cisco IOS Software and Cisco IOS XE Software
CVSS 8.6
Added Mar 03
CVE-2018-0159 HIGH

Cisco IOS and XE Software Internet Key Exchange Version 1 Denial-of-Service Vulnerability

Cisco IOS Software and Cisco IOS XE Software
CVSS 7.5
Added Mar 03
CVE-2018-0161 MEDIUM

Cisco IOS Software Resource Management Errors Vulnerability

Cisco IOS Software
CVSS 6.3
Added Mar 03
CVE-2018-0167 HIGH

Cisco IOS, XR, and XE Software Buffer Overflow Vulnerability

Cisco IOS, XR, and XE Software
CVSS 8.8
Added Mar 03
CVE-2018-0172 HIGH

Cisco IOS and IOS XE Software Improper Input Validation Vulnerability

Cisco IOS and IOS XE Software
CVSS 8.6
Added Mar 03
CVE-2018-0173 HIGH

Cisco IOS and IOS XE Software Improper Input Validation Vulnerability

Cisco IOS and IOS XE Software
CVSS 8.6
Added Mar 03
CVE-2018-0174 HIGH

Cisco IOS Software and Cisco IOS XE Software Improper Input Validation Vulnerability

Cisco IOS XE Software
CVSS 8.6
Added Mar 03
CVE-2018-0175 HIGH

Cisco IOS, XR, and XE Software Buffer Overflow Vulnerability

Cisco IOS, XR, and XE Software
CVSS 8
Added Mar 03
CVE-2018-0179 MEDIUM

Cisco IOS Software Denial-of-Service Vulnerability

Cisco IOS Software
CVSS 6.8
Added Mar 03
CVE-2018-0180 MEDIUM

Cisco IOS Software Denial-of-Service Vulnerability

Cisco IOS Software
CVSS 6.8
Added Mar 03
CVE-2019-1652 HIGH

Cisco Small Business Routers Improper Input Validation Vulnerability

Cisco Small Business RV320 and RV325 Dual Gigabit WAN VPN Routers
CVSS 7.2
Added Mar 03
CVE-2022-20699 CRITICAL

Cisco Small Business RV Series Routers Stack-based Buffer Overflow Vulnerability

Cisco Small Business RV160, RV260, RV340, and RV345 Series Routers
CVSS 10
Added Mar 03
CVE-2022-20700 CRITICAL

Cisco Small Business RV Series Routers Stack-based Buffer Overflow Vulnerability

Cisco Small Business RV160, RV260, RV340, and RV345 Series Routers
CVSS 10
Added Mar 03
CVE-2022-20701 CRITICAL

Cisco Small Business RV Series Routers Stack-based Buffer Overflow Vulnerability

Cisco Small Business RV160, RV260, RV340, and RV345 Series Routers
CVSS 10
Added Mar 03
CVE-2022-20703 CRITICAL

Cisco Small Business RV Series Routers Stack-based Buffer Overflow Vulnerability

Cisco Small Business RV160, RV260, RV340, and RV345 Series Routers
CVSS 10
Added Mar 03
CVE-2022-20708 CRITICAL

Cisco Small Business RV Series Routers Stack-based Buffer Overflow Vulnerability

Cisco Small Business RV160, RV260, RV340, and RV345 Series Routers
CVSS 10
Added Mar 03
CVE-2018-0171 HIGH

Cisco IOS and IOS XE Software Smart Install Remote Code Execution Vulnerability

Cisco IOS and IOS XE
CVSS 7.5
Added Nov 03
CVE-2018-0296 HIGH

Cisco Adaptive Security Appliance (ASA) Denial-of-Service Vulnerability

Cisco Adaptive Security Appliance (ASA)
CVSS 7.5
Added Nov 03
CVE-2019-1653 HIGH

Cisco Small Business RV320 and RV325 Routers Information Disclosure Vulnerability

Cisco Small Business RV320 and RV325 Routers
CVSS 7.5
Added Nov 03
CVE-2020-3118 HIGH

Cisco IOS XR Software Discovery Protocol Format String Vulnerability

Cisco IOS XR
CVSS 8.8
Added Nov 03
CVE-2020-3161 CRITICAL

Cisco IP Phones Web Server Remote Code Execution and Denial-of-Service Vulnerability

Cisco Cisco IP Phones
CVSS 9.8
Added Nov 03
CVE-2020-3452 HIGH

Cisco ASA and FTD Read-Only Path Traversal Vulnerability

Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)
CVSS 7.5
Added Nov 03
CVE-2020-3566 HIGH

Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability

Cisco IOS XR
CVSS 8.6
Added Nov 03
CVE-2020-3569 HIGH

Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability

Cisco IOS XR
CVSS 8.6
Added Nov 03
CVE-2020-3580 MEDIUM Ransomware

Cisco ASA and FTD Cross-Site Scripting (XSS) Vulnerability

Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)
CVSS 6.1
Added Nov 03
CVE-2021-1497 CRITICAL

Cisco HyperFlex HX Installer Virtual Machine Command Injection Vulnerability

Cisco HyperFlex HX
CVSS 9.8
Added Nov 03
CVE-2021-1498 CRITICAL

Cisco HyperFlex HX Data Platform Command Injection Vulnerability

Cisco HyperFlex HX
CVSS 9.8
Added Nov 03