CVE records

Every CVE as the CVE Program publishes it, refreshed every ten minutes, with NVD's analysis, CISA's known-exploited status and a healthcare tag. Subscribers get the CVEs that match their own systems on My program, by email as they are published. Where the data comes from: sources.

Updated under an hour ago (2026-10-19 05:50 UTC)

What this means for you

This week: 5,436 CVEs published, 357 critical, and 7 newly confirmed exploited. Add your stack to see whether any of them hit you.

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This week's critical CVEs

Exploited in the last 30 days

Published in the last 7 days: 5,436; Show in the list
Critical, last 7 days: 357; Show in the list
Healthcare-tagged, last 7 days: 4; Show in the list
Known exploited (CISA KEV): 1,747; Show in the list

Showing CVEs that name the product cisco:ios. Show all products

42 CVEs, showing 1 to 42

CVE	Severity	Title	Published
CVE-2026-20301	High 8.6	A vulnerability in the Extensible Messaging Client Protocol (XMCP), also referred to as the External Client protocol, of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, r…	Aug 5, 2026
CVE-2026-20012	High 8.6	A vulnerability in the Internet Key Exchange version 2 (IKEv2) feature of Cisco IOS Software, Cisco IOS XE Software, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software, and Cisco Secure…	Mar 25, 2026
CVE-2025-20363	Critical 9.0	A vulnerability in the web services of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software, Cisco Secure Firewall Threat Defense (FTD) Software, Cisco IOS Software, Cisco IOS XE Software…	Sep 25, 2025
CVE-2025-20352 Known exploited	High 7.7	A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco IOS Software and Cisco IOS XE Software could allow the following: An authenticated, remote attacker with low privil… Assigned by cisco	Sep 24, 2025
CVE-2023-20109 Known exploited	Medium 6.6	A vulnerability in the Cisco Group Encrypted Transport VPN (GET VPN) feature of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, remote attacker who has administrative contr… Assigned by cisco	Sep 27, 2023
CVE-2018-0180 Known exploited	Medium 6.8	Multiple vulnerabilities in the Login Enhancements (Login Block) feature of Cisco IOS Software could allow an unauthenticated, remote attacker to trigger a reload of an affected system, resulting in… Assigned by cisco	Mar 28, 2018
CVE-2018-0179 Known exploited	Medium 6.8	Multiple vulnerabilities in the Login Enhancements (Login Block) feature of Cisco IOS Software could allow an unauthenticated, remote attacker to trigger a reload of an affected system, resulting in… Assigned by cisco	Mar 28, 2018
CVE-2018-0175 Known exploited	High 8.0	Format String vulnerability in the Link Layer Discovery Protocol (LLDP) subsystem of Cisco IOS Software, Cisco IOS XE Software, and Cisco IOS XR Software could allow an unauthenticated, adjacent atta… Assigned by cisco	Mar 28, 2018
CVE-2018-0174 Known exploited	High 8.6	A vulnerability in the DHCP option 82 encapsulation functionality of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload… Assigned by cisco	Mar 28, 2018
CVE-2018-0173 Known exploited	High 8.6	A vulnerability in the Cisco IOS Software and Cisco IOS XE Software function that restores encapsulated option 82 information in DHCP Version 4 (DHCPv4) packets could allow an unauthenticated, remote… Assigned by cisco	Mar 28, 2018
CVE-2018-0172 Known exploited	High 8.6	A vulnerability in the DHCP option 82 encapsulation functionality of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload… Assigned by cisco	Mar 28, 2018
CVE-2018-0171 Known exploited	High 7.5	A vulnerability in the Smart Install feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to trigger a reload of an affected device, resulting in a… Assigned by cisco	Mar 28, 2018
CVE-2018-0167 Known exploited	High 8.8	Multiple Buffer Overflow vulnerabilities in the Link Layer Discovery Protocol (LLDP) subsystem of Cisco IOS Software, Cisco IOS XE Software, and Cisco IOS XR Software could allow an unauthenticated,… Assigned by cisco	Mar 28, 2018
CVE-2018-0161 Known exploited	Medium 6.3	A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco IOS Software running on certain models of Cisco Catalyst Switches could allow an authenticated, remote attacker to… Assigned by cisco	Mar 28, 2018
CVE-2018-0159 Known exploited	High 7.5	A vulnerability in the implementation of Internet Key Exchange Version 1 (IKEv1) functionality in Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause… Assigned by cisco	Mar 28, 2018
CVE-2018-0158 Known exploited	High 8.6	A vulnerability in the Internet Key Exchange Version 2 (IKEv2) module of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a memory leak or a reloa… Assigned by cisco	Mar 28, 2018
CVE-2018-0156 Known exploited	High 7.5	A vulnerability in the Smart Install feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to trigger a reload of an affected device, resulting in a… Assigned by cisco	Mar 28, 2018
CVE-2018-0155 Known exploited	High 8.6	A vulnerability in the Bidirectional Forwarding Detection (BFD) offload implementation of Cisco Catalyst 4500 Series Switches and Cisco Catalyst 4500-X Series Switches could allow an unauthenticated,… Assigned by cisco	Mar 28, 2018
CVE-2018-0154 Known exploited	High 7.5	A vulnerability in the crypto engine of the Cisco Integrated Services Module for VPN (ISM-VPN) running Cisco IOS Software could allow an unauthenticated, remote attacker to cause a denial of service… Assigned by cisco	Mar 28, 2018
CVE-2017-12319 Known exploited	Medium 5.9	A vulnerability in the Border Gateway Protocol (BGP) over an Ethernet Virtual Private Network (EVPN) for Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause the device to r… Assigned by cisco	Mar 27, 2018
CVE-2017-12240 Known exploited	Critical 9.8	The DHCP relay subsystem of Cisco IOS 12.2 through 15.6 and Cisco IOS XE Software contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code and gain full… Assigned by cisco	Sep 28, 2017
CVE-2017-12238 Known exploited	Medium 6.5	A vulnerability in the Virtual Private LAN Service (VPLS) code of Cisco IOS 15.0 through 15.4 for Cisco Catalyst 6800 Series Switches could allow an unauthenticated, adjacent attacker to cause a C680… Assigned by cisco	Sep 28, 2017
CVE-2017-12237 Known exploited	High 7.5	A vulnerability in the Internet Key Exchange Version 2 (IKEv2) module of Cisco IOS 15.0 through 15.6 and Cisco IOS XE 3.5 through 16.5 could allow an unauthenticated, remote attacker to cause high CP… Assigned by cisco	Sep 28, 2017
CVE-2017-12235 Known exploited	High 7.5	A vulnerability in the implementation of the PROFINET Discovery and Configuration Protocol (PN-DCP) for Cisco IOS 12.2 through 15.6 could allow an unauthenticated, remote attacker to cause an affecte… Assigned by cisco	Sep 28, 2017
CVE-2017-12234 Known exploited	High 7.5	Multiple vulnerabilities in the implementation of the Common Industrial Protocol (CIP) feature in Cisco IOS 12.4 through 15.6 could allow an unauthenticated, remote attacker to cause an affected devi… Assigned by cisco	Sep 28, 2017
CVE-2017-12233 Known exploited	High 7.5	Multiple vulnerabilities in the implementation of the Common Industrial Protocol (CIP) feature in Cisco IOS 12.4 through 15.6 could allow an unauthenticated, remote attacker to cause an affected devi… Assigned by cisco	Sep 28, 2017
CVE-2017-12232 Known exploited	Medium 6.5	A vulnerability in the implementation of a protocol in Cisco Integrated Services Routers Generation 2 (ISR G2) Routers running Cisco IOS 15.0 through 15.6 could allow an unauthenticated, adjacent att… Assigned by cisco	Sep 28, 2017
CVE-2017-12231 Known exploited	High 7.5	A vulnerability in the implementation of Network Address Translation (NAT) functionality in Cisco IOS 12.4 through 15.6 could allow an unauthenticated, remote attacker to cause a denial of service (D… Assigned by cisco	Sep 28, 2017
CVE-2017-6627 Known exploited	High 7.5	A vulnerability in the UDP processing code of Cisco IOS 15.1, 15.2, and 15.4 and IOS XE 3.14 through 3.18 could allow an unauthenticated, remote attacker to cause the input queue of an affected syste… Assigned by cisco	Sep 7, 2017
CVE-2017-6663 Known exploited	Medium 6.5	A vulnerability in the Autonomic Networking feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause autonomic nodes of an affected system to… Assigned by cisco	Aug 7, 2017
CVE-2017-6744 Known exploited	High 8.8	The Simple Network Management Protocol (SNMP) subsystem of Cisco IOS and IOS XE Software contains multiple vulnerabilities that could allow an authenticated, remote attacker to remotely execute code… Assigned by cisco	Jul 17, 2017
CVE-2017-6743 Known exploited	High 8.8	The Simple Network Management Protocol (SNMP) subsystem of Cisco IOS and IOS XE Software contains multiple vulnerabilities that could allow an authenticated, remote attacker to remotely execute code… Assigned by cisco	Jul 17, 2017
CVE-2017-6742 Known exploited	High 8.8	A vulnerability in the SNMP implementation of could allow an authenticated, remote attacker to cause a reload of the affected system or to remotely execute code. Assigned by cisco	Jul 17, 2017
CVE-2017-6740 Known exploited	High 8.8	The Simple Network Management Protocol (SNMP) subsystem of Cisco IOS and IOS XE Software contains multiple vulnerabilities that could allow an authenticated, remote attacker to remotely execute code… Assigned by cisco	Jul 17, 2017
CVE-2017-6739 Known exploited	High 8.8	A vulnerability in the SNMP implementation of could allow an authenticated, remote attacker to cause a reload of the affected system or to remotely execute code. Assigned by cisco	Jul 17, 2017
CVE-2017-6738 Known exploited	High 8.8	The Simple Network Management Protocol (SNMP) subsystem of Cisco IOS and IOS XE Software contains multiple vulnerabilities that could allow an authenticated, remote attacker to remotely execute code… Assigned by cisco	Jul 17, 2017
CVE-2017-6737 Known exploited	High 8.8	A vulnerability in the SNMP implementation of could allow an authenticated, remote attacker to cause a reload of the affected system or to remotely execute code. Assigned by cisco	Jul 17, 2017
CVE-2017-6736 Known exploited	High 8.8	The Simple Network Management Protocol (SNMP) subsystem of Cisco IOS and IOS XE Software contains multiple vulnerabilities that could allow an authenticated, remote attacker to remotely execute code… Assigned by cisco	Jul 17, 2017
CVE-2017-3881 Known exploited	Critical 9.8	A vulnerability in the Cisco Cluster Management Protocol (CMP) processing code in Cisco IOS and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a reload of an affected… Assigned by cisco	Mar 17, 2017
CVE-2016-6415 Known exploited	High 7.5	The server IKEv1 implementation in Cisco IOS 12.2 through 12.4 and 15.0 through 15.6, IOS XE through 3.18S, IOS XR 4.3.x and 5.0.x through 5.2.x, and PIX before 7.0 allows remote attackers to obtain… Assigned by cisco	Sep 19, 2016
CVE-2008-4128 Known exploited	High 8.1	Multiple cross-site request forgery (CSRF) vulnerabilities in the HTTP Administration component in Cisco IOS 12.4 on the 871 Integrated Services Router allow remote attackers to execute arbitrary com… Assigned by mitre	Sep 18, 2008
CVE-2004-1464 Known exploited	Medium 5.9	Cisco IOS 12.2(15) and earlier allows remote attackers to cause a denial of service (refused VTY (virtual terminal) connections), via a crafted TCP connection to the Telnet or reverse Telnet port. Assigned by mitre	Feb 13, 2005

CVSS is the assigning CNA's score where it gives one, otherwise NVD's. The healthcare tag is a documented heuristic (a list of clinical and health IT vendors, and clinical terms in the description), not a classification. The CVE record is authoritative.