# CVE-2017-6739: Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability

> CVE-2017-6739: Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability. CVSS 8.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2017-6739
Last updated: 2025-10-21T23:55:37Z

- Published: 2017-07-17 21:00 UTC · Updated: 2025-10-21 23:55 UTC · Assigner: cisco
- CVSS: 8.8 (CVSS 3.1) · Severity: High · Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS: 10.9%, 96th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2022-03-03, federal due date 2022-03-24, ransomware use: Unknown
- CWE: 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.

## CISA required action

Apply updates per vendor instructions.

## Affected vendors and products

- IntelliShield: Universal Product

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2017-6739)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2017-6739)
- [https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170629-snmp](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170629-snmp)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2017-6739 · Markdown: https://rewindex.com/cve/CVE-2017-6739.md · JSON: https://rewindex.com/api/v1/cves/CVE-2017-6739 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:49:18.216Z