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Cisco IOS and NX-OS Software
Cisco IOS Software Releases 12.4 Special and Early Deployments
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
SNMP Remote Code Execution Vulnerabilities in Cisco IOS and IOS XE Software
30/Jul/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
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 Internet Key Exchange Version 1 Fragmentation Denial of Service Vulnerabilities
27/Mar/2024
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 DHCP Remote Code Execution Vulnerability
17/Dec/2022
Cisco IOS and IOS XE Software Internet Key Exchange Version 1 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 FXO Interface Destination Pattern Bypass Vulnerability
22/Sep/2021
Cisco IOS and IOS XE Software Information Disclosure Vulnerability
24/Sep/2020
Cisco IOS and IOS XE Software ISDN Q.931 Denial of Service 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 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 HTTP Client Information Disclosure Vulnerability
25/Sep/2019
Cisco IOS and IOS XE Software Hot Standby Router Protocol Information Leak Vulnerability
01/Apr/2019
Cisco IOS and IOS XE Software TACACS+ Client Denial of Service Vulnerability
26/Sep/2018
Multiple Cisco Products OSPF LSA Manipulation Vulnerability
03/Aug/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
OSPF LSA Manipulation Vulnerability in Multiple Cisco Products
13/Feb/2017
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 AAA Login 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 DNS Forwarder Denial of Service Vulnerability
28/Sep/2016
Cisco IOS Software and IOS XE Software TCP Packet Memory Leak Vulnerability
14/Jan/2016
Multiple Vulnerabilities in ntpd (April 2015) Affecting Cisco Products
07/Dec/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 Affecting Cisco Products
27/Mar/2015
Cisco IOS Software Multiple Features IP Sockets Vulnerability
15/Feb/2015
Transport Layer Security Renegotiation Vulnerability
09/Nov/2014
Cisco IOS Secure Shell Denial of Service Vulnerabilities
31/May/2014
Vulnerability in Cisco IOS While Processing SSL Packet
31/May/2014
Cisco IOS IPS Denial of Service Vulnerability
31/May/2014
Cisco IOS Software Crafted Encryption Packet Denial of Service Vulnerability
31/May/2014
Cisco IOS Software Zone-Based Policy Firewall Vulnerability
31/May/2014
Cisco IOS Software Network Time Protocol Packet Vulnerability
31/May/2014
Cisco IOS Software Session Initiation Protocol Denial of Service Vulnerability
31/May/2014
Cisco IOS Software Border Gateway Protocol 4-Byte Autonomous System Number Vulnerabilities
31/May/2014
Cisco IOS Software Network Address Translation Vulnerability
31/May/2014
Cisco IOS Software Network Address Translation Vulnerabilities
26/Mar/2014
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 IPv6 Virtual Fragmentation Reassembly Denial of Service Vulnerability
25/Sep/2013
Cisco IOS Software Zone-Based Policy Firewall Session Initiation Protocol Inspection Denial of Service Vulnerability
11/Apr/2013
Cisco IOS Software Protocol Translation Vulnerability
11/Apr/2013
Cisco IOS Software Network Address Translation Denial of Service Vulnerability
27/Mar/2013
Cisco IOS Software DHCP Version 6 Server Denial of Service Vulnerability
18/Oct/2012
Cisco IOS Software Session Initiation Protocol Denial of Service Vulnerability
03/Oct/2012
Cisco IOS Software Intrusion Prevention System Denial of Service Vulnerability
26/Sep/2012
Cisco IOS Software Session Initiation Protocol Denial of Service Vulnerabilities
21/Sep/2012
Cisco IOS Software Crafted TCP Packet Denial of Service Vulnerability
21/Sep/2012
Cisco IOS Software IPsec Vulnerability
21/Sep/2012
Cisco IOS Software H.323 Denial of Service Vulnerabilities
21/Sep/2012
Cisco IOS Software Command Authorization Bypass
28/Mar/2012
Cisco IOS Software Reverse SSH Denial of Service Vulnerability
28/Mar/2012
Cisco IOS Software Zone-Based Firewall Vulnerabilities
28/Mar/2012
Summary of Cisco IOS Software Bundled Advisories, September 22, 2010
22/Sep/2010
Cisco IOS Software H.323 Denial of Service Vulnerability
23/Sep/2009
Cisco IOS Multicast Virtual Private Network (MVPN) Data Leak
26/Mar/2008
Support Documentation
All Support Documentation for this Series