CVE-2017-6744
Cisco IOS Software SNMP Remote Code Execution Vulnerability
Published Jul 17, 2017 · updated Jun 16, 2026 · cisco ios
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.
Timeline
Detection, updates, and resolution for this record.
Jul 17, 2017 · Catalog
Detected
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 direct
Mar 3, 2022 · CISA KEV
Known exploited
Apply updates per vendor instructions.
Mar 24, 2022 · CISA KEV
Remediation due
Apply updates per vendor instructions.
Jun 16, 2026 · Catalog
Updated
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 direct
Required action
Apply updates per vendor instructions.
CISA due date Mar 24, 2022
Affected
- cpe cisco/ios12.2\(33\)sxi
- cpe cisco/ios12.2\(33\)sxi1
- cpe cisco/ios12.2\(50\)se
- cpe cisco/ios12.2\(50\)se1
- cpe cisco/ios12.2\(50\)se2
- cpe cisco/ios12.2\(50\)se3
- cpe cisco/ios12.2\(50\)se4
- cpe cisco/ios12.2\(50\)se5
- vendor Cisco IOS softwareversion unspecified
Sources
- CISA KEVCVE-2017-6744
The Simple Network Management Protocol (SNMP) subsystem of Cisco IOS 1 contains a vulnerability 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.
cisa.gov - CVE.orgCVE-2017-6744
Official CVE identifier
cve.org - FIRST EPSSCVE-2017-6744
30-day exploitation probability 7.3%
first.org - NIST NVDCVE-2017-6744
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 ex
nvd.nist.gov