Technology · Cisco
Cisco Ios Software vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 19 vulnerabilities in Cisco Ios Software: 0 in the last 7 days and 1 in the last 90 days, 18 of them critical and 17 exploited in the wild. The most recent, CVE-2026-20301, was published on 5 August 2026.
- Last 7 days
- 0
- Last 90 days
- 1
- Critical, all time
- 18
- Exploited in the wild
- 17
About Cisco Ios Software
A proprietary operating system used on Cisco Systems routers and network switches.
Latest Cisco Ios Software vulnerabilities
- CVE-2026-20301: Cisco IOS and IOS XE denial of service in XMCPhighCVSS 8.6EPSS 0.6%
- CVE-2025-20363: Cisco multiple platforms code execution in web servicescriticalCVSS 9EPSS 6.9%
- CVE-2018-0156: Cisco IOS Software and Cisco IOS XE Software Smart Install Denial-of-Service Vulnerabilitycriticalexploited in the wildCVSS 7.5
- CVE-2018-0159: Cisco IOS and XE Software Internet Key Exchange Version 1 Denial-of-Service Vulnerabilitycriticalexploited in the wildCVSS 7.5
- CVE-2017-6663: Cisco IOS Software and Cisco IOS XE Software Denial-of-Service Vulnerabilitycriticalexploited in the wildCVSS 6.5
- CVE-2018-0174: Cisco IOS Software and Cisco IOS XE Software Improper Input Validation Vulnerabilitycriticalexploited in the wildCVSS 8.6
- CVE-2017-12232: Cisco IOS Software for Cisco Integrated Services Routers Denial-of-Service Vulnerabilitycriticalexploited in the wildCVSS 6.5
- CVE-2017-6744: Cisco IOS Software SNMP Remote Code Execution Vulnerabilitycriticalexploited in the wildCVSS 8.8
- CVE-2018-0180: Cisco IOS Software Denial-of-Service Vulnerabilitycriticalexploited in the wildCVSS 5.9
- CVE-2017-12231: Cisco IOS Software Network Address Translation Denial-of-Service Vulnerabilitycriticalexploited in the wildCVSS 7.5
- CVE-2018-0154: Cisco IOS Software Integrated Services Module for VPN Denial-of-Service Vulnerabilitycriticalexploited in the wildCVSS 7.5
- CVE-2017-12235: Cisco IOS Software for Cisco Industrial Ethernet Switches PROFINET Denial-of-Service Vulnerabilitycriticalexploited in the wildCVSS 7.5
- CVE-2018-0161: Cisco IOS Software Resource Management Errors Vulnerabilitycriticalexploited in the wildCVSS 6.3
- CVE-2018-0179: Cisco IOS Software Denial-of-Service Vulnerabilitycriticalexploited in the wildCVSS 5.9
- CVE-2018-0151: Cisco IOS Software and Cisco IOS XE Software Quality of Service Remote Code Execution Vulnerabilitycriticalexploited in the wildCVSS 9.8
- CVE-2017-12234: Cisco IOS Software Common Industrial Protocol Request Denial-of-Service Vulnerabilitycriticalexploited in the wildCVSS 7.5
- CVE-2017-12233: Cisco IOS Software Common Industrial Protocol Request Denial-of-Service Vulnerabilitycriticalexploited in the wildCVSS 7.5
- CVE-2018-0158: Cisco IOS and XE Software Internet Key Exchange Memory Leak Vulnerabilitycriticalexploited in the wildCVSS 8.6
- CVE-2018-0172: Cisco IOS and IOS XE Software Improper Input Validation Vulnerabilitycriticalexploited in the wildCVSS 8.6
Most severe Cisco Ios Software vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2018-0151: Cisco IOS Software and Cisco IOS XE Software Quality of Service Remote Code Execution Vulnerabilitycriticalexploited in the wildCVSS 9.8
- CVE-2017-6744: Cisco IOS Software SNMP Remote Code Execution Vulnerabilitycriticalexploited in the wildCVSS 8.8
- CVE-2018-0174: Cisco IOS Software and Cisco IOS XE Software Improper Input Validation Vulnerabilitycriticalexploited in the wildCVSS 8.6
- CVE-2018-0158: Cisco IOS and XE Software Internet Key Exchange Memory Leak Vulnerabilitycriticalexploited in the wildCVSS 8.6
- CVE-2018-0172: Cisco IOS and IOS XE Software Improper Input Validation Vulnerabilitycriticalexploited in the wildCVSS 8.6
- CVE-2017-12231: Cisco IOS Software Network Address Translation Denial-of-Service Vulnerabilitycriticalexploited in the wildCVSS 7.5
- CVE-2018-0156: Cisco IOS Software and Cisco IOS XE Software Smart Install Denial-of-Service Vulnerabilitycriticalexploited in the wildCVSS 7.5
- CVE-2018-0159: Cisco IOS and XE Software Internet Key Exchange Version 1 Denial-of-Service Vulnerabilitycriticalexploited in the wildCVSS 7.5
- CVE-2018-0154: Cisco IOS Software Integrated Services Module for VPN Denial-of-Service Vulnerabilitycriticalexploited in the wildCVSS 7.5
- CVE-2017-12235: Cisco IOS Software for Cisco Industrial Ethernet Switches PROFINET Denial-of-Service Vulnerabilitycriticalexploited in the wildCVSS 7.5
Vulnerabilities per week
The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 29 Jun 2026 | 0 | 0 | |
| 6 Jul 2026 | 0 | 0 | |
| 13 Jul 2026 | 0 | 0 | |
| 20 Jul 2026 | 0 | 0 | |
| 27 Jul 2026 | 0 | 0 | |
| 3 Aug 2026 | 1 | 0 | |
| 10 Aug 2026 | 0 | 0 | |
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 |
How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/technologies/ios-software.json, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "Cisco Ios Software vulnerabilities", https://junglewise.ai/threats/technologies/ios-software, 26 September 2026.