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CVE-2017-6742: Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability

CVSS: 9.0v2.0HighKEVAnalyzed
Published 17-07-2017Last modified 12-01-2026
Open JSON

Vulnerability summary

CVE-2017-6742 is a high (CVSS 9.0) vulnerability in Cisco IOS and IOS XE Software. It is known to be exploited: CISA lists it, first on 19-04-2023. EPSS estimates a 21.42% chance of exploitation in the next 30 days, higher than 97.5% of scored vulnerabilities.

Overall risk
85/100
0100
Critical · default modelHow is this calculated?
CVSS score
9.0/10
010
High · v2.0 (NVD)
EPSS score
21.42%
0%100%
High · 0.00 pp in 30 days
KEVListedCISA
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 17-07-2017
    PublishedVulnerability first disclosed.
  2. 19-04-2023
    Added to CISA KEVCisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability
  3. 10-05-2023
    CISA remediation dueApply updates per vendor instructions.
  4. 12-01-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 2 sources · 3 versions

EPSS trend

Probability

21.42%

Chance of exploitation in the next 30 days

Percentile

98%

Versus all other CVEs

30-day change

0.00 pp

From 21.42% on 19-09-2026

19-09-202619-10-2026
EPSS score
21.42%

Known exploited

Compare KEV catalogs
CISA KEVListed
Added
19-04-2023
Federal due date
10-05-2023

CISA required action

Apply updates per vendor instructions. sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170629-snmp nvd.nist.gov/vuln/detail/CVE-2017-6742

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Cisco3 products
  • cisco ios xe software3.7.0S | 3.7.1S | 3.7.2S | 3.7.3S | 3.7.4S | 3.7.5S | 3.7.6S | 3.7.7S | 3.7.4aS | 3.7.2tS | 3.7.0bS | 3.8.0S | 3.8.1S | 3.8.2S | 3.9.1S | 3.9.0S | 3.9.2S | 3.9.0aS | 3.11.1S | 3.11.2S | 3.11.0S | 3.11.3S | 3.11.4S | 3.12.0S | 3.12.1S | 3.12.2S | 3.12.3S | 3.12.0aS | 3.12.4S | 3.13.0S | 3.13.1S | 3.13.2S | 3.13.3S | 3.13.4S | 3.13.5S | 3.13.2aS | 3.13.0aS | 3.13.5aS | 3.13.6S | 3.13.7S | 3.13.6aS | 3.13.7aS | 3.6.3E | 3.6.6E | 3.6.5bE | 3.14.0S | 3.14.1S | 3.14.2S | 3.14.3S | 3.14.4S | 3.15.0S | 3.15.1S | 3.15.2S | 3.15.1cS | 3.15.3S | 3.15.4S | 3.7.4E | 3.7.5E | 3.16.0S | 3.16.1S | 3.16.1aS | 3.16.2S | 3.16.0cS | 3.16.3S | 3.16.2bS | 3.16.4aS | 3.16.4bS | 3.16.5S | 3.16.4dS | 3.17.0S | 3.17.1S | 3.17.2S | 3.17.1aS | 3.17.3S | 16.2.1 | 16.2.2 | 16.3.1 | 16.3.2 | 16.3.3 | 16.3.1a | 16.3.4 | 16.4.1 | 16.4.2 | 16.5.1 | 16.5.1b | 3.18.0aS | 3.18.0S | 3.18.1S | 3.18.0SP | 3.18.1SP | 3.18.1aSP | 3.18.2aSP
  • ios≥ 12.0, ≤ 12.4 | ≥ 15.0, ≤ 15.6
  • ios_xe≥ 2.2.0, ≤ 3.17
Intellishield1 product

2 vendors · 4 products

References

5 links