CVE-2017-3878

A Denial of Service vulnerability in the Telnet remote login functionality of Cisco NX-OS Software running on Cisco Nexus 9000 Series Switches could allow an unauthenticated, remote attacker to cause a Telnet process used for login to terminate unexpectedly and the login attempt to fail. There is no impact to user traffic flowing through the device. Affected Products: This vulnerability affects Cisco Nexus 9000 Series Switches that are running Cisco NX-OS Software and are configured to allow remote Telnet connections to the device. More Information: CSCux46778. Known Affected Releases: 7.0(3)I3(0.170). Known Fixed Releases: 7.0(3)I3(1) 7.0(3)I3(0.257) 7.0(3)I3(0.255) 7.0(3)I2(2e) 7.0(3)F1(1.22) 7.0(3)F1(1).

• CWE-119

• http://www.securityfocus.com/bid/96927Third Party Advisory, VDB Entry
• http://www.securitytracker.com/id/1038047
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170315-nssVendor Advisory
• http://www.securityfocus.com/bid/96927Third Party Advisory, VDB Entry
• http://www.securitytracker.com/id/1038047
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170315-nssVendor Advisory

Published

Mar 17, 2017

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-2017-3872A cross-site scripting (XSS) filter bypass vulnerability in …
• CVE-2017-3873A vulnerability in the Plug-and-Play (PnP) subsystem of the …
• CVE-2017-3874A vulnerability in the web framework of Cisco Unified Commun…
• CVE-2017-3875An Access-Control Filtering Mechanisms Bypass vulnerability …
• CVE-2017-3876A vulnerability in the Event Management Service daemon (emsd…
• CVE-2017-3877A vulnerability in the web framework of Cisco Unified Commun…
• CVE-2017-3879A Denial of Service vulnerability in the remote login functi…
• CVE-2017-3880An Authentication Bypass vulnerability in Cisco WebEx Meetin…
• CVE-2017-3881A vulnerability in the Cisco Cluster Management Protocol (CM…9.8
• CVE-2017-3882A vulnerability in the Universal Plug-and-Play (UPnP) implem…
• CVE-2017-3883A vulnerability in the authentication, authorization, and ac…
• CVE-2017-3884A vulnerability in the web interface of Cisco Prime Infrastr…