VulnerabilityModified

CVE-2017-3878

MEDIUM 5.3EPSS 2.95%

Does this matter?

Lower severity and a low EPSS score (2.95%). Track it; it rarely justifies an emergency change on its own.

Description

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).

CVSS 3.0: 5.3 MEDIUMCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
EPSS: 2.95% probability · 87th percentile
Public exploits: None in Exploit-DB
CISA KEV: Not listed
Weakness: CWE-119
Affected: cisco/nx-os
Source: psirt@cisco.com

EPSS trend

EPSS 2.9% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

References

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

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.