IOS at a glance
Show as table
| Month | Vulnerabilities | Critical |
|---|---|---|
| Nov 2026 | 0 | 0 |
| Oct 2026 | 0 | 0 |
| Sep 2026 | 0 | 0 |
| Aug 2026 | 1 | 0 |
| Jul 2026 | 0 | 0 |
| Jun 2026 | 0 | 0 |
| May 2026 | 0 | 0 |
| Apr 2026 | 0 | 0 |
| Mar 2026 | 2 | 0 |
| Feb 2026 | 0 | 0 |
| Jan 2026 | 0 | 0 |
| Dec 2025 | 0 | 0 |
| Nov 2025 | 0 | 0 |
| Oct 2025 | 0 | 0 |
| Sep 2025 | 5 | 1 |
| Aug 2025 | 2 | 0 |
| Jul 2025 | 0 | 0 |
| Jun 2025 | 0 | 0 |
| May 2025 | 4 | 0 |
| Apr 2025 | 0 | 0 |
| Mar 2025 | 0 | 0 |
| Feb 2025 | 8 | 0 |
| Jan 2025 | 0 | 0 |
| Dec 2024 | 0 | 0 |
Latest advisories
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High max 8.6WID-SEC-2026-2664 1 CVE
Cisco IOS: Schwachstelle ermöglicht Denial of Service
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Cisco IOS und Cisco IOS XE ausnutzen, um einen Denial of Service Angriff durchzuführen.
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Critical max 9.9
Cisco ASA, FTD, IOS, IOS XE, IOS XR: Mehrere Schwachstellen
Ein entfernter, authentisierter oder anonymer Angreifer kann mehrere Schwachstellen in Cisco ASA (Adaptive Security Appliance), Cisco Secure Firewall Threat Defense, Cisco IOS, Cisco IOS XE und Cisco IOS XR ausnutzen, um die Authentisierung zu umgehen und bel…
first Sep 25, 2025 -
High max 8.6NCSC-2026-0104 10 CVEs
Kwetsbaarheden verholpen in Cisco IOS XE Software
Cisco heeft kwetsbaarheden verholpen in Cisco IOS XE Software, specifiek voor verschillende producten zoals Catalyst 9000 Series Switches, Catalyst CW9800 Family, en Cisco Meraki.
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High max 8.6WID-SEC-2026-0866 1 CVE
Cisco IOS, Cisco IOS XE und Cisco Secure Firewall Threat Defense: Schwachstelle ermöglicht Denial of Service
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Cisco IOS, Cisco IOS XE und Cisco Secure Firewall Threat Defense ausnutzen, um einen Denial of Service Angriff durchzuführen.
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High max 8.6WID-SEC-2026-0874 11 CVEs
Cisco IOS und IOS XE Software: Mehrere Schwachstellen
Ein Angreifer kann mehrere Schwachstellen in Cisco IOS XE, Cisco IOS und Cisco Catalyst ausnutzen, um sich erweiterte Rechte zu verschaffen, beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, Cross-Site-Scripting-Angriffe durchzuführen, Daten zu ma…
39 results · Feed
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High 8.6
Cisco IOS Software and IOS XE Software Extensible Messaging Client Protocol Denial of Service Vulnerability
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, remote attacker to cause a denial of service (DoS) condition …
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High 7.7
A vulnerability in the HTTP Server feature of Cisco IOS Software and Cisco IOS XE Software Release 3E could allow an au…
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High 8.6
A vulnerability in the Internet Key Exchange version 2 (IKEv2) feature of Cisco IOS Software, Cisco IOS XE Software, Ci…
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Critical 9.0
A vulnerability in the web services of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software, Cisco Secure F…
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Medium 6.5
A vulnerability in the CLI of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, local attacker…
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High 7.7
A vulnerability in the web UI of Cisco IOS Software could allow an authenticated, remote attacker with low privileges t…
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High 7.7
A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco IOS Software and Cisco IOS XE Softw…
KEV Sep 29, 2025 -
High 8.1
A vulnerability in the implementation of the TACACS+ protocol in Cisco IOS Software and Cisco IOS XE Software could all…
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High 8.6
A vulnerability in the Internet Key Exchange Version 2 (IKEv2) feature of Cisco IOS Software, IOS XE Software, Secure F…
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Medium 5.8
A vulnerability in the Internet Key Exchange Version 2 (IKEv2) feature of Cisco IOS Software, IOS XE Software, Secure F…
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Medium 5.3
A vulnerability in the Cisco IOx application hosting environment of Cisco IOS Software and Cisco IOS XE Software could …
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High 8.3
A vulnerability in the Cisco Industrial Ethernet Switch Device Manager (DM) of Cisco IOS Software could allow an authen…
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Medium 6.8
A vulnerability in Cisco IOS Software for Cisco Catalyst 2960X, 2960XR, 2960CX, and 3560CX Series Switches could allow …
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Medium 4.7
A vulnerability in the access control list (ACL) programming of Cisco IOS Software that is running on Cisco Catalyst 10…
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High 7.7
A vulnerability in the SNMP subsystem of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, rem…
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High 7.7
A vulnerability in the SNMP subsystem of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, rem…
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High 7.7
A vulnerability in the SNMP subsystem of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, rem…
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High 7.7
A vulnerability in the SNMP subsystem of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, rem…
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High 7.7
A vulnerability in the SNMP subsystem of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, rem…
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High 7.7
A vulnerability in the SNMP subsystem of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, rem…
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High 7.7
A vulnerability in the SNMP subsystem of Cisco IOS Software, Cisco IOS XE Software, and Cisco IOS XR Software could all…
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High 7.7
A vulnerability in the SNMP subsystem of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, rem…
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Medium 6.5
A vulnerability in the web UI feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, r…
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Medium 5.8
A vulnerability in the access control list (ACL) programming of Cisco IOS Software running on Cisco Industrial Ethernet…
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High 8.6
A vulnerability in the Resource Reservation Protocol (RSVP) feature of Cisco IOS Software and Cisco IOS XE Software cou…
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Medium 6.8
A vulnerability in the IKEv1 fragmentation code of Cisco IOS Software and Cisco IOS XE Software could allow an unauthen…
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High 8.6
A vulnerability in the IKEv1 fragmentation code of Cisco IOS Software and Cisco IOS XE Software could allow an unauthen…
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High 7.4
A vulnerability in the Intermediate System-to-Intermediate System (IS-IS) protocol of Cisco IOS Software and Cisco IOS …
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High 7.4
A vulnerability in Cisco IOS Software for Cisco Catalyst 6000 Series Switches could allow an unauthenticated, adjacent …
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High 8.6
A vulnerability in the Locator ID Separation Protocol (LISP) feature of Cisco IOS Software and Cisco IOS XE Software co…
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Medium 6.6CVE-2023-20109 Exploited
A vulnerability in the Cisco Group Encrypted Transport VPN (GET VPN) feature of Cisco IOS Software and Cisco IOS XE Sof…
KEV Oct 10, 2023 -
High 8.0
A vulnerability in the Authentication, Authorization, and Accounting (AAA) feature of Cisco IOS Software and Cisco IOS …
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Unscored —
A memory leak vulnerability exists in Cisco IOS before 15.2(1)T due to a memory leak in the HTTP PROXY Server process (…
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High 8.8
The Simple Network Management Protocol (SNMP) subsystem of Cisco IOS and IOS XE Software contains multiple vulnerabilit…
KEV Mar 3, 2022 -
High 8.8
The Simple Network Management Protocol (SNMP) subsystem of Cisco IOS and IOS XE Software contains multiple vulnerabilit…
KEV Mar 3, 2022 -
High 8.8CVE-2017-6744 Exploited
The Simple Network Management Protocol (SNMP) subsystem of Cisco IOS and IOS XE Software contains multiple vulnerabilit…
KEV Mar 3, 2022 -
High 8.8
A vulnerability in the SNMP implementation of could allow an authenticated, remote attacker to cause a reload of the af…
KEV Mar 3, 2022 -
High 8.8
The Simple Network Management Protocol (SNMP) subsystem of Cisco IOS and IOS XE Software contains multiple vulnerabilit…
KEV Mar 3, 2022 -
High 8.8
The Simple Network Management Protocol (SNMP) subsystem of Cisco IOS and IOS XE Software contains multiple vulnerabilit…
KEV Mar 3, 2022