# Cisco IOS XE Software vulnerabilities Source: https://junglewise.ai/threats/technologies/ios-xe-software Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 11 November 2026, 03:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/technologies/ios-xe-software.json License: CC BY 4.0 with a link back 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. ## Counts - Last 7 days: 0 - Last 30 days: 1 - Last 90 days: 1 - All time: 28 (21 critical, 19 exploited in the wild) ## 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 service](https://junglewise.ai/threats/cve-2026-20179-multiple-cisco-products-are-affected-by-a-vulnerability-in-the) (medium, CVSS 5.8, published 21 Oct 2026) - [CVE-2026-20301: Cisco IOS and IOS XE denial of service in XMCP](https://junglewise.ai/threats/cve-2026-20301-cisco-ios-and-ios-xe-denial-of-service-in-xmcp) (high, CVSS 8.6, published 5 Aug 2026) - [CVE-2026-20267: Cisco IOS XE Software improper access control](https://junglewise.ai/threats/cve-2026-20267-cisco-ios-xe-software-improper-access-control) (critical, CVSS 9, published 5 Aug 2026) - [CVE-2026-20263: Cisco IOS XE BEEP denial of service](https://junglewise.ai/threats/cve-2026-20263-cisco-ios-xe-beep-denial-of-service) (high, CVSS 8.6, published 5 Aug 2026) - [CVE-2026-20124: Cisco IOS XE SNMP denial of service in error handling](https://junglewise.ai/threats/cve-2026-20124-cisco-ios-xe-snmp-denial-of-service-in-error-handling) (high, CVSS 7.7, published 5 Aug 2026) - [CVE-2026-20068: Cisco Snort 3 detection engine denial of service](https://junglewise.ai/threats/cve-2026-20068-cisco-snort-3-detection-engine-denial-of-service) (medium, CVSS 5.8, published 4 Mar 2026) - [CVE-2026-20067: Cisco Snort 3 detection engine denial of service](https://junglewise.ai/threats/cve-2026-20067-cisco-snort-3-detection-engine-denial-of-service) (medium, CVSS 5.8, published 4 Mar 2026) - [CVE-2026-20005: Cisco Snort 3 Detection Engine denial of service in SSL handshake parsing](https://junglewise.ai/threats/cve-2026-20005-cisco-snort-3-detection-engine-denial-of-service-in-ssl-handshake) (medium, CVSS 5.8, published 4 Mar 2026) - [CVE-2025-20363: Cisco multiple platforms code execution in web services](https://junglewise.ai/threats/cve-2025-20363-cisco-multiple-platforms-code-execution-in-web-services) (critical, CVSS 9, published 25 Sep 2025) - [CVE-2017-6742: Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability](https://junglewise.ai/threats/cve-2017-6742-cisco-ios-and-ios-xe-software-snmp-remote-code-execution) (critical, exploited in the wild, CVSS 8.8, published 19 Apr 2023) - [CVE-2017-6739: Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability](https://junglewise.ai/threats/cve-2017-6739-cisco-ios-and-ios-xe-software-snmp-remote-code-execution) (critical, exploited in the wild, CVSS 8.8, published 3 Mar 2022) - [CVE-2018-0151: Cisco IOS Software and Cisco IOS XE Software Quality of Service Remote Code Execution Vulnerability](https://junglewise.ai/threats/cve-2018-0151-cisco-ios-software-and-cisco-ios-xe-software-quality-of-service) (critical, exploited in the wild, CVSS 9.8, published 3 Mar 2022) - [CVE-2017-6627: Cisco IOS Software and Cisco IOS XE Software UDP Packet Processing Denial-of-Service Vulnerability](https://junglewise.ai/threats/cve-2017-6627-cisco-ios-software-and-cisco-ios-xe-software-udp-packet-processing) (critical, exploited in the wild, CVSS 7.5, published 3 Mar 2022) - [CVE-2017-6736: Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability](https://junglewise.ai/threats/cve-2017-6736-cisco-ios-and-ios-xe-software-snmp-remote-code-execution) (critical, exploited in the wild, CVSS 8.8, published 3 Mar 2022) - [CVE-2017-12240: Cisco IOS and IOS XE Software DHCP Remote Code Execution Vulnerability](https://junglewise.ai/threats/cve-2017-12240-cisco-ios-and-ios-xe-software-dhcp-remote-code-execution) (critical, exploited in the wild, CVSS 9.8, published 3 Mar 2022) - [CVE-2017-12237: Cisco IOS and IOS XE Software Internet Key Exchange Denial-of-Service Vulnerability](https://junglewise.ai/threats/cve-2017-12237-cisco-ios-and-ios-xe-software-internet-key-exchange-denial-of) (critical, exploited in the wild, CVSS 7.5, published 3 Mar 2022) - [CVE-2018-0173: Cisco IOS and IOS XE Software Improper Input Validation Vulnerability](https://junglewise.ai/threats/cve-2018-0173-cisco-ios-and-ios-xe-software-improper-input-validation) (critical, exploited in the wild, CVSS 8.6, published 3 Mar 2022) - [CVE-2018-0172: Cisco IOS and IOS XE Software Improper Input Validation Vulnerability](https://junglewise.ai/threats/cve-2018-0172-cisco-ios-and-ios-xe-software-improper-input-validation) (critical, exploited in the wild, CVSS 8.6, published 3 Mar 2022) - [CVE-2017-6737: Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability](https://junglewise.ai/threats/cve-2017-6737-cisco-ios-and-ios-xe-software-snmp-remote-code-execution) (critical, exploited in the wild, CVSS 8.8, published 3 Mar 2022) - [CVE-2017-12319: Cisco IOS XE Software Ethernet Virtual Private Network Border Gateway Protocol Denial-of-Service Vulnerability](https://junglewise.ai/threats/cve-2017-12319-cisco-ios-xe-software-ethernet-virtual-private-network-border) (critical, exploited in the wild, CVSS 5.9, published 3 Mar 2022) - [CVE-2017-6738: Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability](https://junglewise.ai/threats/cve-2017-6738-cisco-ios-and-ios-xe-software-snmp-remote-code-execution) (critical, exploited in the wild, CVSS 8.8, published 3 Mar 2022) - [CVE-2018-0156: Cisco IOS Software and Cisco IOS XE Software Smart Install Denial-of-Service Vulnerability](https://junglewise.ai/threats/cve-2018-0156-cisco-ios-software-and-cisco-ios-xe-software-smart-install-denial) (critical, exploited in the wild, CVSS 7.5, published 3 Mar 2022) - [CVE-2017-6743: Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability](https://junglewise.ai/threats/cve-2017-6743-cisco-ios-and-ios-xe-software-snmp-remote-code-execution) (critical, exploited in the wild, CVSS 8.8, published 3 Mar 2022) - [CVE-2018-0159: Cisco IOS and XE Software Internet Key Exchange Version 1 Denial-of-Service Vulnerability](https://junglewise.ai/threats/cve-2018-0159-cisco-ios-and-xe-software-internet-key-exchange-version-1-denial) (critical, exploited in the wild, CVSS 7.5, published 3 Mar 2022) - [CVE-2017-6663: Cisco IOS Software and Cisco IOS XE Software Denial-of-Service Vulnerability](https://junglewise.ai/threats/cve-2017-6663-cisco-ios-software-and-cisco-ios-xe-software-denial-of-service) (critical, exploited in the wild, CVSS 6.5, published 3 Mar 2022) ## Most severe Cisco IOS XE Software vulnerabilities - [CVE-2018-0151: Cisco IOS Software and Cisco IOS XE Software Quality of Service Remote Code Execution Vulnerability](https://junglewise.ai/threats/cve-2018-0151-cisco-ios-software-and-cisco-ios-xe-software-quality-of-service) (critical, exploited in the wild, CVSS 9.8, published 3 Mar 2022) - [CVE-2017-12240: Cisco IOS and IOS XE Software DHCP Remote Code Execution Vulnerability](https://junglewise.ai/threats/cve-2017-12240-cisco-ios-and-ios-xe-software-dhcp-remote-code-execution) (critical, exploited in the wild, CVSS 9.8, published 3 Mar 2022) - [CVE-2017-6742: Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability](https://junglewise.ai/threats/cve-2017-6742-cisco-ios-and-ios-xe-software-snmp-remote-code-execution) (critical, exploited in the wild, CVSS 8.8, published 19 Apr 2023) - [CVE-2017-6743: Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability](https://junglewise.ai/threats/cve-2017-6743-cisco-ios-and-ios-xe-software-snmp-remote-code-execution) (critical, exploited in the wild, CVSS 8.8, published 3 Mar 2022) - [CVE-2017-6739: Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability](https://junglewise.ai/threats/cve-2017-6739-cisco-ios-and-ios-xe-software-snmp-remote-code-execution) (critical, exploited in the wild, CVSS 8.8, published 3 Mar 2022) - [CVE-2017-6738: Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability](https://junglewise.ai/threats/cve-2017-6738-cisco-ios-and-ios-xe-software-snmp-remote-code-execution) (critical, exploited in the wild, CVSS 8.8, published 3 Mar 2022) - [CVE-2017-6740: Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability](https://junglewise.ai/threats/cve-2017-6740-cisco-ios-and-ios-xe-software-snmp-remote-code-execution) (critical, exploited in the wild, CVSS 8.8, published 3 Mar 2022) - [CVE-2017-6736: Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability](https://junglewise.ai/threats/cve-2017-6736-cisco-ios-and-ios-xe-software-snmp-remote-code-execution) (critical, exploited in the wild, CVSS 8.8, published 3 Mar 2022) - [CVE-2017-6737: Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability](https://junglewise.ai/threats/cve-2017-6737-cisco-ios-and-ios-xe-software-snmp-remote-code-execution) (critical, exploited in the wild, CVSS 8.8, published 3 Mar 2022) - [CVE-2018-0174: Cisco IOS Software and Cisco IOS XE Software Improper Input Validation Vulnerability](https://junglewise.ai/threats/cve-2018-0174-cisco-ios-software-and-cisco-ios-xe-software-improper-input) (critical, exploited in the wild, CVSS 8.6, published 3 Mar 2022) ## Vulnerabilities per week 1 vulnerability in the last four weeks, up from none in the four before. | Week of | Vulns | Critical | Exploited | | --- | --- | --- | --- | | 17 Aug 2026 | 0 | 0 | 0 | | 24 Aug 2026 | 0 | 0 | 0 | | 31 Aug 2026 | 0 | 0 | 0 | | 7 Sep 2026 | 0 | 0 | 0 | | 14 Sep 2026 | 0 | 0 | 0 | | 21 Sep 2026 | 0 | 0 | 0 | | 28 Sep 2026 | 0 | 0 | 0 | | 5 Oct 2026 | 0 | 0 | 0 | | 12 Oct 2026 | 0 | 0 | 0 | | 19 Oct 2026 | 1 | 0 | 0 | | 26 Oct 2026 | 0 | 0 | 0 | | 2 Nov 2026 | 0 | 0 | 0 | | 9 Nov 2026 | 0 | 0 | 0 | ## Other Cisco technologies - [Cisco IOS](https://junglewise.ai/threats/technologies/ios): 70 vulnerabilities - [Cisco Identity Services Engine](https://junglewise.ai/threats/technologies/identity-services-engine): 58 vulnerabilities - [Cisco IOS XE](https://junglewise.ai/threats/technologies/ios-xe): 57 vulnerabilities - [Cisco Firepower Threat Defense](https://junglewise.ai/threats/technologies/firepower-threat-defense): 33 vulnerabilities - [Cisco Firepower Threat Defense Software](https://junglewise.ai/threats/technologies/firepower-threat-defense-software): 33 vulnerabilities - [Cisco IOS XR](https://junglewise.ai/threats/technologies/ios-xr): 31 vulnerabilities - [Cisco Adaptive Security Appliance Software](https://junglewise.ai/threats/technologies/secure-firewall-asa-software): 23 vulnerabilities - [Cisco Snort 3](https://junglewise.ai/threats/technologies/snort-3): 20 vulnerabilities - [Cisco Ios Software](https://junglewise.ai/threats/technologies/ios-software): 19 vulnerabilities - [Cisco ISE Passive Identity Connector](https://junglewise.ai/threats/technologies/ise-passive-identity-connector): 19 vulnerabilities - [Cisco Secure Firewall Management Center](https://junglewise.ai/threats/technologies/secure-firewall-management-center): 16 vulnerabilities - [Cisco Unity Connection](https://junglewise.ai/threats/technologies/unity-connection): 16 vulnerabilities ## Sources NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Cisco IOS XE Software vulnerabilities", https://junglewise.ai/threats/technologies/ios-xe-software, 11 November 2026.