What’s Vulnerable › Vulnerabilities

CVE-2017-6737: Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2022-03-03
• EPSS: 45.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-07-17 · updated 2026-06-17
• Weakness: CWE-119

Description

A vulnerability in the SNMP implementation of could allow an authenticated, remote attacker to cause a reload of the affected system or to remotely execute code. An attacker could exploit this vulnerability by sending a crafted SNMP packet to the affected device.  The vulnerability is due to a buffer overflow in the affected code area. The vulnerability affects all versions of SNMP (versions 1, 2c, and 3). The attacker must know the SNMP read only community string (SNMP version 2c or earlier) or the user credentials (SNMPv3). An exploit could allow the attacker to execute arbitrary code and obtain full control of the system or to cause a reload of the affected system. Only traffic directed to the affected system can be used to exploit this vulnerability.

Affected products

• Cisco IOS: from 12.0 through 12.4; from 15.0 through 15.6
• Cisco IOS XE: from 2.2.0 through 3.17.0

References

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170629-snmp
• http://www.securityfocus.com/bid/99345
• http://www.securitytracker.com/id/1038808
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170629-snmp
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-6737

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