Security Advisories, Responses and Notices
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- Cisco Secure Firewall Adaptive Security Appliance Software, Secure Firewall Threat Defense Software, IOS Software, IOS XE Software, and IOS XR Software Web Services Remote Code Execution Vulnerability 06/Nov/2025
- Cisco IOS and IOS XE Software TACACS+ Authentication Bypass Vulnerability 01/Oct/2025
- Cisco IOS and IOS XE Software CLI Denial of Service Vulnerability 24/Sep/2025
- Cisco IOS, IOS XE, Secure Firewall Adaptive Security Appliance, and Secure Firewall Threat Defense Software IKEv2 Denial of Service Vulnerabilities 14/Aug/2025
- 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 and IOS XE Software SNMPv3 Configuration Restriction 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, IOS XE, and IOS XR Software SNMP Denial of Service Vulnerabilities 12/Mar/2025
- Cisco IOS and IOS XE Software Resource Reservation Protocol Denial of Service Vulnerability 25/Sep/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 Internet Key Exchange Version 1 Fragmentation Denial of Service Vulnerabilities 27/Mar/2024
- Cisco IOS and IOS XE Software Locator ID Separation Protocol 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 IOS and IOS XE Software IPv6 DHCP (DHCPv6) Relay and Server Denial of Service Vulnerability 22/Mar/2023
- Cisco IOS and IOS XE Software Internet Key Exchange Denial of Service Vulnerability 17/Dec/2022
- Cisco IOS Software Network Address Translation Denial of Service Vulnerability 16/Dec/2022
- Cisco IOS and IOS XE Software DHCP Version 4 Relay Heap Overflow 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 SSH Denial of Service Vulnerability 28/Sep/2022
- 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 IKEv2 AutoReconnect Feature Denial of Service 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 ARP Resource Management Exhaustion Denial of Service Vulnerability 24/Mar/2021
- Cisco IOS and IOS XE Software Information Disclosure Vulnerability 24/Sep/2020
- Cisco IOS and IOS XE Software Tcl Denial of Service Vulnerability 08/Jun/2020
- Cisco IOS, IOS XE, IOS XR, and NX-OS Software One Platform Kit Remote Code Execution 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 and IOS XE Software Internet Key Exchange Version 2 Denial of Service 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 Cisco IOS XE Software Web UI Cross-Site Request Forgery Vulnerability 28/Apr/2020
- Cisco IOS and IOS XE Software Session Initiation Protocol Denial of Service Vulnerability 04/Oct/2019
- Cisco IOS and IOS XE Software Change of Authorization Denial of Service Vulnerability 25/Sep/2019
- Cisco IOS and IOS XE Software IP Ident Denial of Service Vulnerability 25/Sep/2019
- Cisco IOS and IOS XE Software HTTP Client Information Disclosure Vulnerability 25/Sep/2019
- Cisco Products IPv6 Neighbor Discovery Crafted Packet Denial of Service Vulnerability 16/Sep/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 Network Plug-and-Play Agent Certificate Validation 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 Smart Call Home Certificate Validation Vulnerability 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 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 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 and IOS XE Software Plug and Play Agent Memory Leak 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 Cisco Discovery 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 VLAN Trunking 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 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 Layer 2 Tunneling Protocol Denial of Service Vulnerability 22/Mar/2017
- Cisco IOS and IOS XE Software IPv6 Denial of Service Vulnerability 20/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 First Hop Security Denial of Service Vulnerabilities 08/Dec/2016
- IKEv1 Information Disclosure Vulnerability in Multiple Cisco Products 05/Oct/2016
- Cisco IOS and IOS XE Software H.323 Message Validation Denial of Service Vulnerability 28/Sep/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 IP Detail Record 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 Multicast Routing Denial of Service Vulnerabilities 28/Sep/2016
- Cisco IOS and IOS XE Software AAA Login Denial of Service Vulnerability 28/Sep/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 DHCPv6 Relay Denial of Service Vulnerability 23/Mar/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 and IOS XE Software SSH Version 2 RSA-Based User Authentication Bypass Vulnerability 23/Sep/2015
- Multiple Vulnerabilities in OpenSSL (January 2015) Affecting Cisco Products 10/Mar/2015