What’s Vulnerable › Vulnerabilities

CVE-2018-0456: Cisco NX-OS Software Authenticated Simple Network Management Protocol Denial of Service Vulnerability

• Severity: high (CVSS 7.7 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-10-17 · updated 2026-06-17
• Weakness: CWE-20

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.

Affected products

• Cisco NX-OS: 9.2(0.43)

References

• http://www.securityfocus.com/bid/105668
• http://www.securitytracker.com/id/1041921
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181017-nxos-snmp
• http://www.securityfocus.com/bid/105668
• http://www.securitytracker.com/id/1041921
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181017-nxos-snmp

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