Technology · Cisco
Cisco IOS XE Software vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 28 vulnerabilities in Cisco IOS XE Software: 0 in the last 7 days and 1 in the last 90 days, 21 of them critical and 19 exploited in the wild. The most recent, CVE-2026-20179, was published on 21 October 2026. 1 vulnerability in the last four weeks, up from none in the four before.
- Last 7 days
- 0
- Last 90 days
- 1
- Critical, all time
- 21
- Exploited in the wild
- 19
About Cisco IOS XE Software
Operating system software for Cisco IOS XE network devices including routers and switches.
Latest Cisco IOS XE Software vulnerabilities
- CVE-2026-20179: Cisco Snort 3 GRE detection engine denial of servicemediumCVSS 5.8
- CVE-2026-20301: Cisco IOS and IOS XE denial of service in XMCPhighCVSS 8.6EPSS 0.6%
- CVE-2026-20267: Cisco IOS XE Software improper access controlcriticalCVSS 9EPSS 0.4%
- CVE-2026-20263: Cisco IOS XE BEEP denial of servicehighCVSS 8.6EPSS 0.6%
- CVE-2026-20124: Cisco IOS XE SNMP denial of service in error handlinghighCVSS 7.7EPSS 0.5%
- CVE-2026-20068: Cisco Snort 3 detection engine denial of servicemediumCVSS 5.8EPSS 0.4%
- CVE-2026-20067: Cisco Snort 3 detection engine denial of servicemediumCVSS 5.8EPSS 0.4%
- CVE-2026-20005: Cisco Snort 3 Detection Engine denial of service in SSL handshake parsingmediumCVSS 5.8EPSS 0.5%
- CVE-2025-20363: Cisco multiple platforms code execution in web servicescriticalCVSS 9EPSS 6.9%
- CVE-2017-6742: Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerabilitycriticalexploited in the wildCVSS 8.8
- CVE-2017-6739: Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerabilitycriticalexploited in the wildCVSS 8.8
- CVE-2018-0151: Cisco IOS Software and Cisco IOS XE Software Quality of Service Remote Code Execution Vulnerabilitycriticalexploited in the wildCVSS 9.8
- CVE-2017-6627: Cisco IOS Software and Cisco IOS XE Software UDP Packet Processing Denial-of-Service Vulnerabilitycriticalexploited in the wildCVSS 7.5
- CVE-2017-6736: Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerabilitycriticalexploited in the wildCVSS 8.8
- CVE-2017-12240: Cisco IOS and IOS XE Software DHCP Remote Code Execution Vulnerabilitycriticalexploited in the wildCVSS 9.8
- CVE-2017-12237: Cisco IOS and IOS XE Software Internet Key Exchange Denial-of-Service Vulnerabilitycriticalexploited in the wildCVSS 7.5
- CVE-2018-0173: Cisco IOS and IOS XE Software Improper Input Validation 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-2017-6737: Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerabilitycriticalexploited in the wildCVSS 8.8
- CVE-2017-12319: Cisco IOS XE Software Ethernet Virtual Private Network Border Gateway Protocol Denial-of-Service Vulnerabilitycriticalexploited in the wildCVSS 5.9
- CVE-2017-6738: Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerabilitycriticalexploited in the wildCVSS 8.8
- CVE-2018-0156: Cisco IOS Software and Cisco IOS XE Software Smart Install Denial-of-Service Vulnerabilitycriticalexploited in the wildCVSS 7.5
- CVE-2017-6743: Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerabilitycriticalexploited in the wildCVSS 8.8
- 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
Most severe Cisco IOS XE 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-2017-12240: Cisco IOS and IOS XE Software DHCP Remote Code Execution Vulnerabilitycriticalexploited in the wildCVSS 9.8
- CVE-2017-6742: Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerabilitycriticalexploited in the wildCVSS 8.8
- CVE-2017-6743: Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerabilitycriticalexploited in the wildCVSS 8.8
- CVE-2017-6739: Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerabilitycriticalexploited in the wildCVSS 8.8
- CVE-2017-6738: Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerabilitycriticalexploited in the wildCVSS 8.8
- CVE-2017-6740: Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerabilitycriticalexploited in the wildCVSS 8.8
- CVE-2017-6736: Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerabilitycriticalexploited in the wildCVSS 8.8
- CVE-2017-6737: Cisco IOS and IOS XE 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
Vulnerabilities per week
1 vulnerability in the last four weeks, up from none in the four before. The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 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 | |
| 28 Sep 2026 | 0 | 0 | |
| 5 Oct 2026 | 0 | 0 | |
| 12 Oct 2026 | 0 | 0 | |
| 19 Oct 2026 | 1 | 0 | |
| 26 Oct 2026 | 0 | 0 | |
| 2 Nov 2026 | 0 | 0 | |
| 9 Nov 2026 | 0 | 0 |
Embed a badge
A live badge for a README, a status page or an internal wiki: how many Cisco IOS XE Software vulnerabilities were published in the last 7 days and how many of them are critical, refreshed hourly.
[](https://junglewise.ai/threats/technologies/ios-xe-software)<a href="https://junglewise.ai/threats/technologies/ios-xe-software"><img src="https://junglewise.ai/threats/technologies/ios-xe-software/badge.svg" alt="Cisco IOS XE Software vulnerabilities" /></a>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-xe-software.json, and this page as text at https://junglewise.ai/threats/technologies/ios-xe-software.md, 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 XE Software vulnerabilities", https://junglewise.ai/threats/technologies/ios-xe-software, 11 November 2026.