Security Advisories, Responses and Notices
Some links below may open a new browser window to display the document you selected.
-
- Cisco IOS and IOS XE Software Smart Install Remote Code Execution Vulnerability 20/Aug/2025Updated
- Cisco IOS, IOS XE, Secure Firewall Adaptive Security Appliance, and Secure Firewall Threat Defense Software IKEv2 Denial of Service Vulnerabilities 14/Aug/2025New
- SNMP Remote Code Execution Vulnerabilities in Cisco IOS and IOS XE Software 30/Jul/2025
- Cisco IOS, IOS XE, and IOS XR Software TWAMP Denial of Service Vulnerability 07/May/2025
- Cisco IOS Software on Cisco Catalyst 1000 and 2960L Switches Access Control List Bypass Vulnerability 07/May/2025
- Cisco IOS Software for Cisco Catalyst 2960X, 2960XR, 2960CX, and 3560CX Series Switches Secure Boot Bypass Vulnerability 07/May/2025
- Cisco Adaptive Security Appliance Software, Firepower Threat Defense Software, IOS Software, and IOS XE Software IKEv2 Denial of Service Vulnerability 07/May/2025
- Cisco IOS and IOS XE Software SNMPv3 Configuration Restriction Vulnerability 07/May/2025
- Multiple Cisco Products Switch Integrated Security Features DHCPv6 Denial of Service Vulnerability 07/May/2025
- Cisco IOx Application Hosting Environment Denial of Service Vulnerability 07/May/2025
- Cisco IOS Software Industrial Ethernet Switch Device Manager Privilege Escalation Vulnerability 07/May/2025
- Cisco IOS, IOS XE, and IOS XR Software SNMP Denial of Service Vulnerabilities 12/Mar/2025
- Cisco IOS and IOS XE Software Web UI Cross-Site Request Forgery Vulnerability 25/Sep/2024
- Cisco IOS Software on Cisco Industrial Ethernet Series Switches Access Control List Bypass Vulnerability 25/Sep/2024
- Cisco IOS and IOS XE Software Resource Reservation Protocol Denial of Service Vulnerability 25/Sep/2024
- Cisco IOS and IOS XE Software SNMP Extended Named Access Control List Bypass Vulnerability 17/Apr/2024
- Cisco IOS Software for Catalyst 6000 Series Switches Denial of Service Vulnerability 04/Apr/2024
- Cisco IOS and IOS XE Software Locator ID Separation Protocol Denial of Service Vulnerability 27/Mar/2024
- Cisco IOS and IOS XE Software Internet Key Exchange Version 1 Fragmentation Denial of Service Vulnerabilities 27/Mar/2024
- Cisco IOS and IOS XE Software Intermediate System-to-Intermediate System Denial of Service Vulnerability 27/Mar/2024
- Cisco IOS and IOS XE Software Command Authorization Bypass Vulnerability 13/Oct/2023
- Cisco IOS and IOS XE Software Cisco Group Encrypted Transport VPN Software Out-of-Bounds Write Vulnerability 27/Sep/2023
- Cisco IOx Application Hosting Environment Command Injection Vulnerability 01/Jun/2023
- Cisco IOS and IOS XE Software IPv6 DHCP (DHCPv6) Relay and Server Denial of Service Vulnerability 22/Mar/2023
- Cisco Adaptive Security Appliance Software, Firepower Threat Defense Software, IOS Software, and IOS XE Software IPv6 DHCP (DHCPv6) Client Denial of Service Vulnerability 22/Mar/2023
- Cisco IOS Software for Cisco Industrial Ethernet Switches PROFINET Denial of Service Vulnerability 17/Dec/2022
- Cisco IOS and IOS XE Software DHCP Remote Code Execution Vulnerability 17/Dec/2022
- Cisco IOS and IOS XE Software Internet Key Exchange Denial of Service Vulnerability 17/Dec/2022
- Cisco IOS Software for Cisco Integrated Services Routers Generation 2 Denial of Service Vulnerability 17/Dec/2022
- Cisco IOS Software Network Address Translation Denial of Service Vulnerability 16/Dec/2022
- Cisco IOS Software Common Industrial Protocol Request Denial of Service Vulnerabilities 16/Dec/2022
- Cisco IOS and IOS XE Software DHCP Version 4 Relay Denial of Service Vulnerability 15/Dec/2022
- Cisco IOS and IOS XE Software Internet Key Exchange Version 1 Denial of Service Vulnerability 15/Dec/2022
- Cisco IOS Software Integrated Services Module for VPN Denial of Service Vulnerability 15/Dec/2022
- Cisco IOS and IOS XE Software DHCP Version 4 Relay Heap Overflow Denial of Service Vulnerability 15/Dec/2022
- Cisco IOS Software Simple Network Management Protocol GET MIB Object ID Denial of Service Vulnerability 15/Dec/2022
- Cisco IOS and IOS XE Software Internet Key Exchange Memory Leak Vulnerability 15/Dec/2022
- Cisco IOS, IOS XE, and IOS XR Software Link Layer Discovery Protocol Buffer Overflow Vulnerabilities 15/Dec/2022
- Cisco IOS and IOS XE Software DHCP Version 4 Relay Reply Denial of Service Vulnerability 15/Dec/2022
- Cisco IOS and IOS XE Software Smart Install Denial of Service Vulnerability 15/Dec/2022
- Cisco IOS and IOS XE Software Bidirectional Forwarding Detection Denial of Service Vulnerability 15/Dec/2022
- Vulnerabilities in Layer 2 Network Security Controls Affecting Cisco Products: September 2022 05/Oct/2022
- Cisco IOS and IOS XE Software Common Industrial Protocol Request Denial of Service Vulnerability 28/Sep/2022
- Cisco IOS and IOS XE Software SSH Denial of Service Vulnerability 28/Sep/2022
- Cisco IOx Application Hosting Environment Vulnerabilities 12/May/2022
- Cisco IOS and IOS XE Software Web Services Denial of Service Vulnerability 13/Apr/2022
- Cisco 1000 Series Connected Grid Router Integrated Wireless Access Point Denial of Service Vulnerability 13/Apr/2022
- Multiple Cisco Products Server Name Identification Data Exfiltration Vulnerability 27/Sep/2021
- Cisco IOS and IOS XE Software IKEv2 AutoReconnect Feature Denial of Service Vulnerability 22/Sep/2021
- Cisco IOS and IOS XE Software TrustSec CLI Parser Denial of Service Vulnerability 22/Sep/2021
- Cisco IOS and IOS XE Software FXO Interface Destination Pattern Bypass Vulnerability 22/Sep/2021
- Cisco IOS and IOS XE Software Link Layer Discovery Protocol Denial of Service Vulnerability 22/Sep/2021
- Multiple Cisco Operating Systems Unidirectional Link Detection Denial of Service Vulnerability 22/Sep/2021
- Cisco IOS and IOS XE Software Privilege Escalation Vulnerability 13/Apr/2021
- Cisco IOx Application Environment Path Traversal Vulnerability 30/Mar/2021
- Cisco IOS and IOS XE Software ARP Resource Management Exhaustion Denial of Service Vulnerability 24/Mar/2021
- Cisco IOS and IOS XE Software Common Industrial Protocol Privilege Escalation Vulnerability 24/Mar/2021
- Cisco IOx Application Framework Denial of Service Vulnerability 24/Mar/2021
- Cisco IOS and IOS XE Software PROFINET Link Layer Discovery Protocol Denial of Service Vulnerability 09/Dec/2020
- Cisco IOS and IOS XE Software PROFINET Denial of Service Vulnerability 09/Dec/2020
- Cisco IOS and IOS XE Software ISDN Q.931 Denial of Service Vulnerability 24/Sep/2020
- Cisco IOS and IOS XE Software MP-BGP EVPN Denial of Service Vulnerability 24/Sep/2020
- Cisco IOS Software for Cisco Industrial Routers Virtual-LPWA Unauthorized Access Vulnerability 24/Sep/2020
- Cisco IOS and IOS XE Software Information Disclosure Vulnerability 24/Sep/2020
- Cisco IOS and IOS XE Software Split DNS Denial of Service Vulnerability 24/Sep/2020
- Cisco IOS and IOS XE Software Tcl Denial of Service Vulnerability 08/Jun/2020
- Cisco IOS and IOS XE Software Internet Key Exchange Version 2 Denial of Service Vulnerability 03/Jun/2020
- Cisco IOS, IOS XE, IOS XR, and NX-OS Software One Platform Kit Remote Code Execution Vulnerability 03/Jun/2020
- Cisco IOS and IOS XE Software Simple Network Management Protocol Denial of Service Vulnerability 03/Jun/2020
- Cisco IOS Software for Cisco 800 Series Industrial Integrated Services Routers Image Verification Bypass Vulnerability 03/Jun/2020
- Cisco IOS and IOS XE Software Session Initiation Protocol Denial of Service Vulnerability 03/Jun/2020
- Cisco IOS, IOS XE, and NX-OS Software Security Group Tag Exchange Protocol Denial of Service Vulnerability 03/Jun/2020
- Cisco IOS Software for Cisco Industrial Routers Virtual Device Server Static Credentials Vulnerability 03/Jun/2020
- Cisco IOS Software for Catalyst 2960-L Series Switches and Catalyst CDB-8P Switches 802.1X Authentication Bypass Vulnerability 03/Jun/2020
- Cisco IOS Software for Cisco Industrial Routers Arbitrary Code Execution Vulnerabilities 03/Jun/2020
- Cisco IOx Application Environment for IOS Software for Cisco Industrial Routers Vulnerabilities 03/Jun/2020
- Cisco IOS Software for Cisco Industrial Routers Virtual Device Server Inter-VM Channel Command Injection Vulnerability 03/Jun/2020
- Cisco IOS Software for Cisco Industrial Routers Virtual Device Server CLI Command Injection Vulnerability 03/Jun/2020
- Cisco IOS and IOS XE Software Secure Shell Denial of Service Vulnerability 03/Jun/2020
- Cisco IOS and IOS XE Software Tcl Arbitrary Code Execution Vulnerability 03/Jun/2020
- Cisco IOS and IOS XE Software Common Industrial Protocol Denial of Service Vulnerabilities 03/Jun/2020
- Cisco IOS and Cisco IOS XE Software Web UI Cross-Site Request Forgery Vulnerability 28/Apr/2020
- Cisco IOS and IOS XE Software IP Ident Denial of Service Vulnerability 25/Sep/2019
- Cisco Catalyst 4000 Series Switches TCP Denial of Service Vulnerability 25/Sep/2019
- Cisco IOS and IOS XE Software Change of Authorization Denial of Service Vulnerability 25/Sep/2019
- Cisco IOx for IOS Software Guest Operating System Unauthorized Access Vulnerability 25/Sep/2019
- Cisco IOS and IOS XE Software HTTP Client Information Disclosure Vulnerability 25/Sep/2019
- Cisco IOx Application Environment Denial of Service Vulnerability 25/Sep/2019
- Cisco IOS and IOS XE Software Session Initiation Protocol Denial of Service Vulnerability 25/Sep/2019
- Cisco Products IPv6 Neighbor Discovery Crafted Packet Denial of Service Vulnerability 16/Sep/2019
- Cisco IOS Software Precision Time Protocol Denial of Service Vulnerability 15/Jul/2019
- Cisco IOS and IOS XE Software Cluster Management Protocol Remote Code Execution Vulnerability 17/Apr/2019
- Cisco IOS and IOS XE Software Hot Standby Router Protocol Information Leak Vulnerability 01/Apr/2019
- Cisco IOS and IOS XE Software ISDN Interface Denial of Service Vulnerability 27/Mar/2019
- Cisco IOS and IOS XE Software Information Disclosure Vulnerability 27/Mar/2019
- Cisco IOS and IOS XE Software Smart Call Home Certificate Validation Vulnerability 27/Mar/2019
- Cisco IOS Software NAT64 Denial of Service Vulnerability 27/Mar/2019
- Cisco IOS and IOS XE Software Short Message Service Denial of Service Vulnerability 27/Mar/2019
- Cisco IOS and IOS XE Software Network-Based Application Recognition Denial of Service Vulnerabilities 27/Mar/2019
- Cisco IOS and IOS XE Software IP Service Level Agreement Denial of Service Vulnerability 27/Mar/2019
- Cisco IOS and IOS XE Software Network Plug-and-Play Agent Certificate Validation Vulnerability 27/Mar/2019
- Cisco IOS Software Catalyst 6500 Series 802.1x Authentication Bypass Vulnerability 27/Mar/2019
- Cisco IOS and IOS XE Software Cluster Management Protocol Denial of Service Vulnerability 27/Mar/2019
- Cisco IOS and IOS XE Software TCP Denial of Service Vulnerability 09/Jan/2019
- Cisco IOS and IOS XE Software Secure Shell Connection on VRF Vulnerability 09/Jan/2019
- Cisco IOS and IOS XE Software SM-1T3/E3 Service Module Denial of Service Vulnerability 26/Sep/2018
- Cisco IOS and IOS XE Software Plug and Play Agent Memory Leak Vulnerability 26/Sep/2018
- Cisco IOS and IOS XE Software IPv6 Hop-by-Hop Options Denial of Service Vulnerability 26/Sep/2018
- Cisco IOS and IOS XE Software OSPFv3 Denial of Service Vulnerability 26/Sep/2018
- Cisco IOS Software for Cisco 800 Series Industrial Integrated Services Routers Arbitrary Memory Write Vulnerabilities 26/Sep/2018
- Cisco IOS and IOS XE Software VLAN Trunking Protocol Denial of Service Vulnerability 26/Sep/2018
- Cisco IOS and IOS XE Software Cluster Management Protocol Denial of Service Vulnerability 26/Sep/2018
- Cisco IOS and IOS XE Software TACACS+ Client Denial of Service Vulnerability 26/Sep/2018
- Cisco IOS and IOS XE Software Cisco Discovery Protocol Denial of Service Vulnerability 26/Sep/2018
- Cisco IOS and IOS XE Software Quality of Service Remote Code Execution Vulnerability 27/Apr/2018
- Cisco IOS and IOS XE Software EnergyWise Denial of Service Vulnerabilities 22/Mar/2018
- Cisco IOS and IOS XE Software Crafted Network Time Protocol Packets Denial of Service Vulnerability 27/Feb/2018
- Cisco IOS Software for Cisco Catalyst 6800 Series Switches VPLS Denial of Service Vulnerability 27/Sep/2017
- Cisco IOS and IOS XE Software Plug-and-Play PKI API Certificate Validation Vulnerability 27/Sep/2017
- Multiple Cisco Products OSPF LSA Manipulation Vulnerability 03/Aug/2017
- Cisco IOS and IOS XE Software Autonomic Control Plane Channel Information Disclosure Vulnerability 26/Jul/2017
- Cisco IOS and IOS XE Software Autonomic Networking Infrastructure Denial of Service Vulnerability 26/Jul/2017
- Cisco IOS and IOS XE Software DHCP Client Denial of Service Vulnerability 22/Mar/2017
- Cisco IOS and IOS XE Software Layer 2 Tunneling Protocol Denial of Service Vulnerability 22/Mar/2017
- Cisco IOS and IOS XE Software Autonomic Networking Infrastructure Registrar Denial of Service Vulnerability 20/Mar/2017
- Cisco IOS and IOS XE Software IPv6 Denial of Service Vulnerability 20/Mar/2017
- OSPF LSA Manipulation Vulnerability in Multiple Cisco Products 13/Feb/2017
- Cisco IOS and IOS XE Software IPv6 First Hop Security Denial of Service Vulnerabilities 08/Dec/2016
- Cisco IOS Software and IOS XE Software Internet Key Exchange Version 2 Denial of Service Vulnerabilities 07/Dec/2016
- IKEv1 Information Disclosure Vulnerability in Multiple Cisco Products 05/Oct/2016
- Cisco IOS and IOS XE Software Internet Key Exchange Version 1 Fragmentation Denial of Service Vulnerability 28/Sep/2016
- Cisco IOS and IOS XE Software H.323 Message Validation Denial of Service Vulnerability 28/Sep/2016
- Cisco IOS and IOS XE Software IP Detail Record Denial of Service Vulnerability 28/Sep/2016
- Cisco IOS Software Common Industrial Protocol Request Denial of Service Vulnerability 28/Sep/2016
- Cisco IOS and IOS XE Software DNS Forwarder Denial of Service Vulnerability 28/Sep/2016
- Cisco IOS and IOS XE Software AAA Login Denial of Service Vulnerability 28/Sep/2016
- Cisco IOS and IOS XE Software Smart Install Memory Leak Vulnerability 28/Sep/2016
- Cisco IOS and IOS XE Software Multicast Routing Denial of Service Vulnerabilities 28/Sep/2016
- Cisco IOS and IOS XE and Cisco Unified Communications Manager Software Session Initiation Protocol Memory Leak Vulnerability 09/May/2016
- Multiple Vulnerabilities in OpenSSL Affecting Cisco Products: May 2016 04/May/2016
- Cisco IOS and NX-OS Software Locator/ID Separation Protocol Packet Denial of Service Vulnerability 23/Mar/2016
- Cisco IOS and IOS XE Software DHCPv6 Relay Denial of Service Vulnerability 23/Mar/2016
- Cisco IOS Software Wide Area Application Services Express Denial of Service Vulnerability 23/Mar/2016
- Cisco IOS and IOS XE Software Internet Key Exchange Version 2 Fragmentation Denial of Service Vulnerability 23/Mar/2016
- Cisco IOS and IOS XE Software Smart Install Denial of Service Vulnerability 23/Mar/2016
- Multiple Vulnerabilities in OpenSSL Affecting Cisco Products: March 2016 02/Mar/2016
- Cisco IOS Software Virtual Routing and Forwarding ICMP Queue Wedge Vulnerability 14/Jan/2016
- Cisco IOS Software and IOS XE Software TCP Packet Memory Leak Vulnerability 14/Jan/2016
- Multiple Vulnerabilities in Cisco IOS Software Common Industrial Protocol 14/Jan/2016
- Multiple Vulnerabilities in Cisco IOS Software and IOS XE Software Autonomic Networking Infrastructure 14/Jan/2016
- Multiple Vulnerabilities in ntpd (April 2015) Affecting Cisco Products 07/Dec/2015
- OpenSSL RSA Temporary Key Cryptographic Downgrade Vulnerability 08/Oct/2015
- Cisco IOS XE Cisco Discovery Protocol Packet Processing Denial of Service Vulnerability 08/Oct/2015
- Cisco IOS and IOS XE Software SSH Version 2 RSA-Based User Authentication Bypass Vulnerability 23/Sep/2015
- Cisco IOS Software TFTP Server Denial of Service Vulnerability 22/Jul/2015
- Cisco IOS Software Multicast Source Discovery Protocol Vulnerability 10/Jul/2015
- Cisco IOS Internet Key Exchange Vulnerability 10/Jul/2015
- Cisco Unified Communications Manager Session Initiation Protocol Denial of Service Vulnerability 10/Jul/2015
- Cisco IOS Software RSVP Vulnerability 10/Jul/2015
- Multiple Vulnerabilities in OpenSSL (June 2015) Affecting Cisco Products 12/Jun/2015
- Multiple Vulnerabilities in OpenSSL Affecting Cisco Products 27/Mar/2015
- Cisco IOS Software and IOS XE Software mDNS Gateway Denial of Service Vulnerability 25/Mar/2015
- Multiple Vulnerabilities in OpenSSL (January 2015) Affecting Cisco Products 10/Mar/2015
- Cisco IOS Software Metadata Vulnerabilities 24/Sep/2014
- Cisco IOS Software Network Address Translation Denial of Service Vulnerability 24/Sep/2014
- Multiple Vulnerabilities in Cisco IOS Software Multicast Domain Name System 24/Sep/2014
- Cisco IOS Software Session Initiation Protocol Denial of Service Vulnerability 24/Sep/2014
- Cisco IOS Software DHCP Version 6 Denial of Service Vulnerability 24/Sep/2014
- Cisco IOS Software and Cisco IOS XE Software EnergyWise Crafted Packet Denial of Service Vulnerability 20/Aug/2014
- Cisco IOS Software IPsec Denial of Service Vulnerability 25/Jun/2014
- Cisco IOS Software Network Address Translation Vulnerability 31/May/2014
- Cisco IOS Software Internet Key Exchange Memory Leak Vulnerability 31/May/2014
- Cisco IOS Software Session Initiation Protocol Denial of Service Vulnerability 31/May/2014
- Cisco IOS Software Session Initiation Protocol Denial of Service Vulnerability 31/Mar/2014
- Cisco IOS Software SSL VPN Denial of Service Vulnerability 26/Mar/2014
- Cisco 7600 Series Route Switch Processor 720 with 10 Gigabit Ethernet Uplinks Denial of Service Vulnerability 26/Mar/2014
- Cisco IOS Software Internet Key Exchange Version 2 Denial of Service Vulnerability 26/Mar/2014
- Cisco IOS Software Crafted IPv6 Packet Denial of Service Vulnerability 26/Mar/2014
- Cisco IOS Software Network Address Translation Vulnerabilities 26/Mar/2014
- Cisco IOS Software Resource Reservation Protocol Interface Queue Wedge Vulnerability 12/Mar/2014
- Cisco IOS Software Queue Wedge Denial of Service Vulnerability 25/Sep/2013
- Cisco IOS Software IPv6 Virtual Fragmentation Reassembly Denial of Service Vulnerability 25/Sep/2013
- Cisco IOS Software Zone-Based Firewall and Content Filtering Vulnerability 25/Sep/2013
- Cisco IOS Software Network Address Translation Vulnerabilities 25/Sep/2013
- Cisco IOS Software Multicast Network Time Protocol Denial of Service Vulnerability 25/Sep/2013
- Cisco IOS Software DHCP Denial of Service Vulnerability 25/Sep/2013
- Cisco IOS Software IP Service Level Agreement Vulnerability 12/Apr/2013
- Cisco IOS Software Smart Install Denial of Service Vulnerability 11/Apr/2013
- Cisco IOS Software Zone-Based Policy Firewall Session Initiation Protocol Inspection Denial of Service Vulnerability 11/Apr/2013
- Cisco IOS Software Internet Key Exchange Vulnerability 11/Apr/2013
- Cisco IOS Software Protocol Translation Vulnerability 11/Apr/2013
- Cisco IOS Software Resource Reservation Protocol Denial of Service Vulnerability 11/Apr/2013
- Cisco IOS Software Network Address Translation Denial of Service Vulnerability 27/Mar/2013
- Cisco IOS Software Tunneled Traffic Queue Wedge Vulnerability 18/Jan/2013
- Cisco IOS Software DHCP Version 6 Server Denial of Service Vulnerability 18/Oct/2012
- Cisco IOS Software Malformed Border Gateway Protocol Attribute Vulnerability 04/Oct/2012
- Cisco IOS Software Session Initiation Protocol Denial of Service Vulnerability 03/Oct/2012
- Cisco IOS Software DHCP Denial of Service Vulnerability 26/Sep/2012
- Cisco IOS Software Intrusion Prevention System Denial of Service Vulnerability 26/Sep/2012
- Cisco IOS Software Network Address Translation Vulnerabilities 26/Sep/2012
- Cisco IOS Software Smart Install Denial of Service Vulnerability 06/Apr/2012
- Cisco IOS Software Zone-Based Firewall Vulnerabilities 28/Mar/2012
- Cisco IOS Software Network Address Translation Vulnerability 28/Mar/2012
- Multiple Vulnerabilities in Cisco IOS Software Traffic Optimization Features 28/Mar/2012
- Cisco IOS Software RSVP Denial of Service Vulnerability 28/Mar/2012
- Cisco IOS Software Reverse SSH Denial of Service Vulnerability 28/Mar/2012
- Cisco IOS Software Command Authorization Bypass 28/Mar/2012
- Cisco IOS Software Crafted IPv6 over MPLS Denial of Service Vulnerability 28/Sep/2011
- Cisco IOS Multicast Virtual Private Network (MVPN) Data Leak 26/Mar/2008
- Multiple Vulnerabilities in the IOS FTP Server 09/May/2007
Support Documentation
Security Notices