CVE-2017-6738

Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability

High 8.8
Exploited: added to CISA KEV 3 Mar 2022

Description

The Simple Network Management Protocol (SNMP) subsystem of Cisco IOS and IOS XE Software contains multiple vulnerabilities that could allow an authenticated, remote attacker to remotely execute code on an affected system or cause an affected system to reload. An attacker could exploit these vulnerabilities by sending a crafted SNMP packet to an affected system via IPv4 or IPv6. Only traffic directed to an affected system can be used to exploit these vulnerabilities. The vulnerabilities are due to a buffer overflow condition in the SNMP subsystem of the affected software. The vulnerabilities affect all versions of SNMP - Versions 1, 2c, and 3. To exploit these vulnerabilities via SNMP Version 2c or earlier, the attacker must know the SNMP read-only community string for the affected system. To exploit these vulnerabilities via SNMP Version 3, the attacker must have user credentials for the affected system. A successful exploit could allow the attacker to execute arbitrary code and obtain full control of the affected system or cause the affected system to reload. Customers are advised to apply the workaround as contained in the Workarounds section below. Fixed software information is available via the Cisco IOS Software Checker. All devices that have enabled SNMP and have not explicitly excluded the affected MIBs or OIDs should be considered vulnerable. There are workarounds that address these vulnerabilities.

Key facts

Published: 17 Jul 2017
Last changed: 21 Oct 2025
Assigned by: cisco
KEV added: 3 Mar 2022
KEV fix due: 24 Mar 2022
EPSS: 10.855% likely to be exploited in the next 30 days, higher than 95.932% of CVEs (scores for 15 Nov 2026)
SSVC (CISA): Exploitation: active; Automatable: no; Technical impact: total

Severity scores

Each score is shown as its source gave it. They are not averaged or merged.

8.8CVSS 3.0, Highfrom the CNA (cisco)CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

What to do

Apply updates per vendor instructions.CISA KEV required action

Historical context and remediation

This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.

No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.

Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.

Read the original CVE record.

Affected products

Vendor	Product	Versions
Cisco	IOS	12.2(53)SE1 (affected) 12.2(55)SE (affected) 12.2(50)SE2 (affected) 12.2(50)SE1 (affected) 12.2(50)SE5 (affected) 12.2(53)SE (affected) 12.2(55)SE3 (affected) 12.2(55)SE2 (affected) 12.2(52)SE (affected) 12.2(58)SE (affected) 12.2(50)SE3 (affected) 12.2(55)SE1 (affected) 12.2(53)SE2 (affected) 12.2(52)SE1 (affected) 12.2(54)SE (affected) 12.2(50)SE4 (affected) 12.2(50)SE (affected) 12.2(58)SE1 (affected) 12.2(55)SE4 (affected) 12.2(58)SE2 (affected) 12.2(55)SE5 (affected) 12.2(55)SE6 (affected) 12.2(55)SE7 (affected) 12.2(55)SE8 (affected) 12.2(55)SE9 (affected) 12.2(55)SE10 (affected) 12.2(55)SE11 (affected) 12.2(53)EX (affected) 12.2(52)EX (affected) 12.2(55)EX (affected) 12.2(52)EX1 (affected) 12.2(55)EX1 (affected) 12.2(55)EX2 (affected) 12.2(55)EX3 (affected) 12.2(58)EX (affected) 12.2(55)EY (affected) 12.2(52)EY1 (affected) 12.2(52)EY (affected) 12.2(53)EY (affected) 12.2(52)EY2 (affected) 12.2(52)EY1b (affected) 12.2(52)EY1c (affected) 12.2(58)EY (affected) 12.2(52)EY3 (affected) 12.2(52)EY2a (affected) 12.2(58)EY1 (affected) 12.2(52)EY4 (affected) 12.2(52)EY3a (affected) 12.2(58)EY2 (affected) 12.2(58)EZ (affected) 12.2(53)EZ (affected) 12.2(55)EZ (affected) 12.2(60)EZ (affected) 12.2(60)EZ1 (affected) 12.2(60)EZ2 (affected) 12.2(60)EZ3 (affected) 12.2(60)EZ4 (affected) 12.2(60)EZ5 (affected) 12.2(60)EZ6 (affected) 12.2(60)EZ7 (affected) 12.2(60)EZ8 (affected) 12.2(60)EZ9 (affected) 12.2(60)EZ10 (affected) 12.2(60)EZ11 (affected) 12.2(50)SG3 (affected) 12.2(53)SG (affected) 12.2(50)SG6 (affected) 12.2(53)SG1 (affected) 12.2(53)SG2 (affected) 12.2(50)SG5 (affected) 12.2(53)SG3 (affected) 12.2(50)SG8 (affected) 12.2(50)SG2 (affected) 12.2(54)SG1 (affected) 12.2(50)SG1 (affected) 12.2(52)SG (affected) 12.2(54)SG (affected) 12.2(50)SG (affected) 12.2(50)SG7 (affected) 12.2(53)SG4 (affected) 12.2(50)SG4 (affected) 12.2(53)SG5 (affected) 12.2(53)SG6 (affected) 12.2(53)SG7 (affected) 12.2(53)SG8 (affected) 12.2(53)SG9 (affected) 12.2(53)SG10 (affected) 12.2(53)SG11 (affected) 12.2(33)SXI (affected) 12.2(33)SXI1 (affected) 12.2(52)XO (affected) 12.2(54)XO (affected) 12.2(50)SQ2 (affected) 12.2(50)SQ1 (affected) 12.2(50)SQ (affected) 12.2(50)SQ3 (affected) 12.2(50)SQ4 (affected) 12.2(50)SQ5 (affected) 12.2(50)SQ6 (affected) 12.2(50)SQ7 (affected) 15.0(1)XO1 (affected) 15.0(1)XO (affected) 15.0(2)XO (affected) 15.3(1)T (affected) 15.3(2)T (affected) 15.3(1)T1 (affected) 15.3(1)T2 (affected) 15.3(1)T3 (affected) 15.3(1)T4 (affected) 15.3(2)T1 (affected) 15.3(2)T2 (affected) 15.3(2)T3 (affected) 15.3(2)T4 (affected) 15.0(1)EY (affected) 15.0(1)EY1 (affected) 15.0(1)EY2 (affected) 15.0(2)EY (affected) 15.0(2)EY1 (affected) 15.0(2)EY2 (affected) 15.0(2)EY3 (affected) 12.2(54)WO (affected) 15.0(1)SE (affected) 15.0(2)SE (affected) 15.0(1)SE1 (affected) 15.0(1)SE2 (affected) 15.0(1)SE3 (affected) 15.0(2)SE1 (affected) 15.0(2)SE2 (affected) 15.0(2)SE3 (affected) 15.0(2)SE4 (affected) 15.0(2)SE5 (affected) 15.0(2)SE6 (affected) 15.0(2)SE7 (affected) 15.0(2)SE8 (affected) 15.0(2)SE9 (affected) 15.0(2)SE10 (affected) 15.0(2)SE10a (affected) 15.1(1)SG (affected) 15.1(2)SG (affected) 15.1(1)SG1 (affected) 15.1(1)SG2 (affected) 15.1(2)SG1 (affected) 15.1(2)SG2 (affected) 15.1(2)SG3 (affected) 15.1(2)SG4 (affected) 15.1(2)SG5 (affected) 15.1(2)SG6 (affected) 15.1(2)SG7 (affected) 15.1(2)SG8 (affected) 15.2(4)M (affected) 15.2(4)M1 (affected) 15.2(4)M2 (affected) 15.2(4)M4 (affected) 15.2(4)M3 (affected) 15.2(4)M5 (affected) 15.2(4)M8 (affected) 15.2(4)M10 (affected) 15.2(4)M7 (affected) 15.2(4)M6 (affected) 15.2(4)M9 (affected) 15.2(4)M6a (affected) 15.2(4)M11 (affected) 15.0(2)SG (affected) 15.0(2)SG1 (affected) 15.0(2)SG2 (affected) 15.0(2)SG3 (affected) 15.0(2)SG4 (affected) 15.0(2)SG5 (affected) 15.0(2)SG6 (affected) 15.0(2)SG7 (affected) 15.0(2)SG8 (affected) 15.0(2)SG9 (affected) 15.0(2)SG10 (affected) 15.0(2)SG11 (affected) 15.0(2)SG11a (affected) 15.0(1)EX (affected) 15.0(2)EX (affected) 15.0(2)EX1 (affected) 15.0(2)EX2 (affected) 15.0(2)EX3 (affected) 15.0(2)EX4 (affected) 15.0(2)EX5 (affected) 15.0(2)EX8 (affected) 15.0(2a)EX5 (affected) 15.0(2)EX10 (affected) 15.0(2)EX11 (affected) 15.0(2)EX13 (affected) 15.0(2)EX12 (affected) 15.2(2)GC (affected) 15.2(3)GC (affected) 15.2(3)GC1 (affected) 15.2(4)GC (affected) 15.2(4)GC2 (affected) 15.2(4)GC3 (affected) 15.4(1)T (affected) 15.4(2)T (affected) 15.4(1)T2 (affected) 15.4(1)T1 (affected) 15.4(1)T3 (affected) 15.4(2)T1 (affected) 15.4(2)T3 (affected) 15.4(2)T2 (affected) 15.4(1)T4 (affected) 15.4(2)T4 (affected) 15.0(2)EA (affected) 15.0(2)EA1 (affected) 15.2(1)E (affected) 15.2(2)E (affected) 15.2(1)E1 (affected) 15.2(3)E (affected) 15.2(1)E2 (affected) 15.2(1)E3 (affected) 15.2(2)E1 (affected) 15.2(4)E (affected) 15.2(3)E1 (affected) 15.2(2)E2 (affected) 15.2(2a)E1 (affected) 15.2(2)E3 (affected) 15.2(2a)E2 (affected) 15.2(3)E2 (affected) 15.2(3a)E (affected) 15.2(3)E3 (affected) 15.2(4)E1 (affected) 15.2(2)E4 (affected) 15.2(2)E5 (affected) 15.2(4)E2 (affected) 15.2(3)E4 (affected) 15.2(5)E (affected) 15.2(4)E3 (affected) 15.2(2)E6 (affected) 15.2(5a)E (affected) 15.2(5)E1 (affected) 15.2(5b)E (affected) 15.2(2)E5a (affected) 15.2(5c)E (affected) 15.2(2)E5b (affected) 15.2(5a)E1 (affected) 15.2(4)E4 (affected) 15.2(5)E2 (affected) 15.3(3)M (affected) 15.3(3)M1 (affected) 15.3(3)M2 (affected) 15.3(3)M3 (affected) 15.3(3)M5 (affected) 15.3(3)M4 (affected) 15.3(3)M6 (affected) 15.3(3)M7 (affected) 15.3(3)M8 (affected) 15.3(3)M9 (affected) 15.3(3)M8a (affected) 15.2(4)JN (affected) 15.0(2)EZ (affected) 15.2(1)EY (affected) 15.0(2)EJ (affected) 15.0(2)EJ1 (affected) 15.2(1)SY (affected) 15.2(1)SY1 (affected) 15.2(1)SY0a (affected) 15.2(1)SY2 (affected) 15.2(2)SY (affected) 15.2(1)SY1a (affected) 15.2(2)SY1 (affected) 15.2(2)SY2 (affected) 15.2(1)SY3 (affected) 15.2(1)SY4 (affected) 15.2(5)EX (affected) 15.2(4)JAZ1 (affected) 15.0(2)EK (affected) 15.0(2)EK1 (affected) 15.4(1)CG (affected) 15.4(1)CG1 (affected) 15.4(2)CG (affected) 15.2(2)EB (affected) 15.2(2)EB1 (affected) 15.2(2)EB2 (affected) 15.5(1)T (affected) 15.5(1)T1 (affected) 15.5(2)T (affected) 15.5(1)T2 (affected) 15.5(1)T3 (affected) 15.5(2)T1 (affected) 15.5(2)T2 (affected) 15.5(2)T3 (affected) 15.5(2)T4 (affected) 15.5(1)T4 (affected) 15.2(2)EA (affected) 15.2(2)EA1 (affected) 15.2(2)EA2 (affected) 15.2(3)EA (affected) 15.2(4)EA (affected) 15.2(4)EA1 (affected) 15.2(2)EA3 (affected) 15.2(4)EA3 (affected) 15.2(5)EA (affected) 15.2(4)EA4 (affected) 15.2(4)EA5 (affected) 15.5(3)M (affected) 15.5(3)M1 (affected) 15.5(3)M0a (affected) 15.5(3)M2 (affected) 15.5(3)M3 (affected) 15.5(3)M4 (affected) 15.5(3)M4a (affected) 15.5(3)M5 (affected) 15.3(3)JAA1 (affected) 15.0(2)SQD (affected) 15.0(2)SQD1 (affected) 15.0(2)SQD2 (affected) 15.0(2)SQD3 (affected) 15.0(2)SQD4 (affected) 15.0(2)SQD5 (affected) 15.0(2)SQD6 (affected) 15.6(1)T (affected) 15.6(2)T (affected) 15.6(1)T0a (affected) 15.6(1)T1 (affected) 15.6(2)T1 (affected) 15.6(1)T2 (affected) 15.6(2)T2 (affected) 15.6(1)T3 (affected) 15.3(1)SY (affected) 15.3(1)SY1 (affected) 15.3(1)SY2 (affected) 15.6(3)M (affected) 15.6(3)M1 (affected) 15.6(3)M0a (affected) 15.6(3)M1b (affected) 15.6(3)M2 (affected) 15.6(3)M2a (affected) 15.2(4)EC1 (affected) 15.2(4)EC2 (affected) 15.3(3)JPC5 (affected) 15.4(1)SY (affected) 15.4(1)SY1 (affected) 15.4(1)SY2 (affected) 15.5(1)SY (affected) 15.3(3)JPR1 (affected)
Cisco	Cisco IOS XE Software	3.2.0SG (affected) 3.2.1SG (affected) 3.2.2SG (affected) 3.2.3SG (affected) 3.2.4SG (affected) 3.2.5SG (affected) 3.2.6SG (affected) 3.2.7SG (affected) 3.2.8SG (affected) 3.2.9SG (affected) 3.2.10SG (affected) 3.2.11SG (affected) 3.3.0SG (affected) 3.3.2SG (affected) 3.3.1SG (affected) 3.2.0SE (affected) 3.2.1SE (affected) 3.2.2SE (affected) 3.2.3SE (affected) 3.3.0SE (affected) 3.3.1SE (affected) 3.3.2SE (affected) 3.3.3SE (affected) 3.3.4SE (affected) 3.3.5SE (affected) 3.4.0SG (affected) 3.4.2SG (affected) 3.4.1SG (affected) 3.4.3SG (affected) 3.4.4SG (affected) 3.4.5SG (affected) 3.4.6SG (affected) 3.4.7SG (affected) 3.4.8SG (affected) 3.5.0E (affected) 3.5.1E (affected) 3.5.2E (affected) 3.5.3E (affected) 3.6.0E (affected) 3.6.1E (affected) 3.6.2aE (affected) 3.6.2E (affected) 3.6.3E (affected) 3.6.4E (affected) 3.6.5E (affected) 3.6.6E (affected) 3.6.5aE (affected) 3.6.5bE (affected) 3.3.0SQ (affected) 3.3.1SQ (affected) 3.4.0SQ (affected) 3.4.1SQ (affected) 3.7.0E (affected) 3.7.1E (affected) 3.7.2E (affected) 3.7.3E (affected) 3.7.4E (affected) 3.7.5E (affected) 3.5.0SQ (affected) 3.5.1SQ (affected) 3.5.2SQ (affected) 3.5.3SQ (affected) 3.5.4SQ (affected) 3.5.5SQ (affected) 3.5.6SQ (affected) 16.1.1 (affected) 16.1.2 (affected) 16.1.3 (affected) 16.2.1 (affected) 16.2.2 (affected) 3.8.0E (affected) 3.8.1E (affected) 3.8.2E (affected) 3.8.3E (affected) 3.8.4E (affected) 16.3.1 (affected) 16.3.2 (affected) 16.3.3 (affected) 16.3.1a (affected) 16.3.4 (affected) 16.4.1 (affected) 16.4.2 (affected) 16.5.1 (affected) 16.5.1a (affected) 16.5.1b (affected) 3.18.1aSP (affected) 3.18.2aSP (affected) 3.9.0E (affected) 3.9.1E (affected) 3.9.2E (affected) 17.11.99SW (affected)

Timeline

17 Jul 2017 Published
3 Mar 2022 CVE-2017-6738 added to CISA KEV
3 Mar 2022 Added to the CISA KEV catalogue

Weakness

CWE-119

References

cisco-sa-20170629-snmp