CVE-2020-3200

A vulnerability in the Secure Shell (SSH) server code of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, remote attacker to cause an affected device to reload. The vulnerability is due to an internal state not being represented correctly in the SSH state machine, which leads to an unexpected behavior. An attacker could exploit this vulnerability by creating an SSH connection to an affected device and using a specific traffic pattern that causes an error condition within that connection. A successful exploit could allow an attacker to cause the device to reload, resulting in a denial of service (DoS) condition.

• CWE-371
• CWE-436

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ssh-dos-Un22sd2APatch, Vendor Advisory
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ssh-dos-Un22sd2APatch, Vendor Advisory

Published

Jun 3, 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-2020-3194A vulnerability in Cisco Webex Network Recording Player for …7.8
• CVE-2020-3195A vulnerability in the Open Shortest Path First (OSPF) imple…7.5
• CVE-2020-3196A vulnerability in the Secure Sockets Layer (SSL)/Transport …8.6
• CVE-2020-3197A vulnerability in the API subsystem of Cisco Meetings App c…5.3
• CVE-2020-3198Multiple vulnerabilities in Cisco IOS Software for Cisco 809…9.8
• CVE-2020-3199Multiple vulnerabilities in the Cisco IOx application enviro…8.8
• CVE-2020-3201A vulnerability in the Tool Command Language (Tcl) interpret…6
• CVE-2020-3203A vulnerability in the locally significant certificate (LSC)…8.6
• CVE-2020-3204A vulnerability in the Tool Command Language (Tcl) interpret…6.7
• CVE-2020-3205A vulnerability in the implementation of the inter-VM channe…8.8
• CVE-2020-3206A vulnerability in the handling of IEEE 802.11w Protected Ma…4.7
• CVE-2020-3207A vulnerability in the processing of boot options of specifi…6.7