CVE-2017-6742

CVE Enrichment

CVSS: 8.8 HIGH
EPSS: 21.42%
EPSS Percentile: 97.56%
CISA KEV: YES — Known Exploited Vulnerability

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.

Technical Details

CVSS Version: 3.1
CNA / NVD Source: psirt@cisco.com
Published: 18-Jul-2017 04:29
Last Modified: 17-Jun-2026 08:22
EPSS Date: 2026-10-12
CWE: CWE-119

CVSS Vector


            CVSS:3.1                            AV:N /
                            AC:L /
                            PR:L /
                            UI:N /
                            S:U /
                            C:H /
                            I:H /
                            A:H

CISA KEV Details

Date Added: 2023-04-19
Remediation Due: 2023-05-10
Known Ransomware Campaign Use: Unknown
Required Action: Apply updates per vendor instructions.
Notes: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170629-snmp; https://nvd.nist.gov/vuln/detail/CVE-2017-6742

Affected Products / Versions

cisco / ios
Version / affected range: * · from (inclusive) 12.0 · through (inclusive) 12.4
cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
cisco / ios
Version / affected range: * · from (inclusive) 15.0 · through (inclusive) 15.6
cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
cisco / ios_xe
Version / affected range: * · from (inclusive) 2.2.0 · through (inclusive) 3.17
cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*

References

Last enrichment sync: 13-Oct-2026 12:33
Sources: NVD · FIRST EPSS · CISA KEV
Latest successful provider update; providers refresh independently.

Reported Context (1)

for poorly selected SNMP community strings. Once a community string is found, the attacker exploits CVE-2017-6742, which was first announced on June 29, 2017, after which a software patch was made available to all Cisco Warns State-Sponsored Actors Are Targeting Network Infrastructure

Malware (1)

People (1)

MITRE ATT&CK (6)

Vendors (1)

Products (9)

Tools (1)

Countries (2)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.