CVE-2017-6738

Published Jul 17, 2017 CVSS 3.1 · 8.8 High EPSS 10.9% KEV · Listed

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.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Cisco

IOS

affected

Version	Status	Constraints
`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

affected

Version	Status	Constraints
`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	—

Configuration 1 [-]

OR	cpe:2.3:o:cisco:ios::::::::
	cpe:2.3:o:cisco:ios::::::::
	cpe:2.3:o:cisco:ios_xe::::::::

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

No advisories available

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

Access Vector Network

Access Complexity Low

Authentication Single

Confidentiality Impact Complete

Integrity Impact Complete

Availability Impact Complete

This CVE is in the KEV database since March 3, 2022.

Exploit prediction score: 10.9% (10.855% probability within 30 days)

Exploitation active

Automatable no

Technical Impact total

References

Link	Providers
http://www.securityfocus.com/bid/99345
http://www.securitytracker.com/id/1038808
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170629-snmp
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170629-snmp
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-6738

History

Oct 22, 2025 12:30 AM Added references View changes

Type	Values Removed	Values Added
References		https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-6738

Oct 21, 2025 8:30 PM References updated View changes

Type	Values Removed	Values Added
References	https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-6738

Oct 21, 2025 7:30 PM Added references View changes

Type	Values Removed	Values Added
References		https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-6738

Jul 31, 2025 4:30 PM Description updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description	The Simple Network Management Protocol (SNMP) subsystem of Cisco IOS 12.0 through 12.4 and 15.0 through 15.6 and IOS XE 2.2 through 3.17 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. All devices that have enabled SNMP and have not explicitly excluded the affected MIBs or OIDs should be considered vulnerable. Cisco Bug IDs: CSCve89865, CSCsy56638.	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.
References		https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170629-snmp
Metrics		cvssV3_0 `{'score': 8.8, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}`

Nov 15, 2024 6:15 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		kev `{'dateAdded': '2022-03-03'}` ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'active', 'Technical Impact': 'total'}, 'version': '2.0.3'}`