CVE-2018-0456

Name: CVE-2018-0456
Creator: NVD / NIST
Published: 2018-10-17T20:29:00.253+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 3.17%

Last modified Jun 17, 2026

CVE-2018-0456 is a vulnerability of currently unknown severity. A vulnerability in the Simple Network Management Protocol (SNMP) input packet processor of Cisco NX-OS Software could allow an authenticated, remote attacker to cause the SNMP application of an affected device to restart unexpectedly. The vulnerability is due to improper validation of SNMP protocol data units (PDUs) in SNMP packets. EPSS estimates a 3.17% chance of exploitation in the next 30 days.

Description

A vulnerability in the Simple Network Management Protocol (SNMP) input packet processor of Cisco NX-OS Software could allow an authenticated, remote attacker to cause the SNMP application of an affected device to restart unexpectedly. The vulnerability is due to improper validation of SNMP protocol data units (PDUs) in SNMP packets. An attacker could exploit this vulnerability by sending a crafted SNMP packet to an affected device. A successful exploit could allow the attacker to cause the SNMP application to restart multiple times, leading to a system-level restart and a denial of service (DoS) condition.

Metrics

EPSS Probability

3.17%

86.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Cisco	Nx-Os	9.2\(0.43\)

References

http://www.securityfocus.com/bid/105668Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1041921Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181017-nxos-snmpVendor Advisory
http://www.securityfocus.com/bid/105668Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1041921Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181017-nxos-snmpVendor Advisory

Timeline

Published: Oct 17, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-0456?

How severe is CVE-2018-0456?

Severity scoring for CVE-2018-0456 is pending analysis. The EPSS model estimates a 3.17% probability of exploitation in the next 30 days.

How do I fix CVE-2018-0456?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-0456?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST