CVE-2020-26070

A vulnerability in the ingress packet processing function of Cisco IOS XR Software for Cisco ASR 9000 Series Aggregation Services Routers could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper resource allocation when an affected device processes network traffic in software switching mode (punted). An attacker could exploit this vulnerability by sending specific streams of Layer 2 or Layer 3 protocol data units (PDUs) to an affected device. A successful exploit could cause the affected device to run out of buffer resources, which could make the device unable to process or forward traffic, resulting in a DoS condition. The device would need to be restarted to regain functionality.

• CWE-404
• CWE-404

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xr-cp-dos-ej8VB9QYVendor Advisory
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xr-cp-dos-ej8VB9QYVendor Advisory

Published

Nov 12, 2020

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2020-26064A vulnerability in the web UI of Cisco SD-WAN vManage Softwa…8.1
• CVE-2020-26065A vulnerability in the web-based management interface of Cis…6.5
• CVE-2020-26066A vulnerability in the web UI of Cisco SD-WAN vManage S…6.5
• CVE-2020-26067A vulnerability in the web-based interface of Cisco Web…5.4
• CVE-2020-26068A vulnerability in the xAPI service of Cisco Telepresence CE…6.5
• CVE-2020-2607Vulnerability in the PeopleSoft Enterprise PeopleTools produ…6.1
• CVE-2020-26071A vulnerability in the CLI of Cisco SD-WAN Software cou…8.4
• CVE-2020-26072A vulnerability in the SOAP API of Cisco IoT Field Network D…8.7
• CVE-2020-26073A vulnerability in the application data endpoints of Cisco&n…7.5
• CVE-2020-26074A vulnerability in system file transfer functions of Cisco&n…7.8
• CVE-2020-26075A vulnerability in the REST API of Cisco IoT Field Network D…8.8
• CVE-2020-26076A vulnerability in Cisco IoT Field Network Director (FND) co…7.5