Vulnerability · CVE-2017-6744
Cisco IOS Software SNMP Remote Code Execution Vulnerability
Published Jul 17, 2017 · catalog updated Jun 16, 2026 · Cisco IOS
Patch now
CVE-2017-6744 is in the CISA known-exploited catalog, due Mar 24, 2022. Confirm Cisco IOS against the vendor advisory and apply that fix. The CVSS score does not change the priority.
- Severity
- High8.8
- Known exploitation
- CISA KEV and VulnCheck KEV
- EPSS
- 7.29%
- Remediation
- Remediation guidance
- Affected products
- cpe cisco/ios · vendor Cisco IOS · vendor Cisco IOS software
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.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- 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 IOSversion unspecified
- vendor Cisco IOS softwareversion unspecified
How to fix CVE-2017-6744
Recommended remediation
Apply updates per vendor instructions. CISA due date Mar 24, 2022.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
CVE-2017-6744 is in the CISA known-exploited catalog, due Mar 24, 2022. Confirm Cisco IOS against the vendor advisory and apply that fix. The CVSS score does not change the priority.
Which versions are affected?
Compare what you have installed with 12.2\(33\)sxi, 12.2\(33\)sxi1, 12.2\(50\)se, 12.2\(50\)se1, 12.2\(50\)se2, 12.2\(50\)se3. Apply updates per vendor instructions.
What should an analyst verify?
CWE-119: Buffer Overflow. EPSS 7.29%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Technology hubs
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
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
Sources
- CISA KEVConfirmed exploitationCVE-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.orgVulnerability recordCVE-2017-6744
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2017-6744
30-day exploitation probability 7.3%
first.org - NIST NVDVulnerability recordCVE-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 - VulnCheck KEVConfirmed exploitationCVE-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
vulncheck.com
References
Freshness
Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.