CVE-2017-6744VulnerabilityPublished 03/03/2022Updated 10/24/2026

CVE-2017-6744: Cisco IOS Software SNMP Remote Code Execution Vulnerability

Affects Cisco IOS softwareSource CISA KEV

Severity

High

No CVSS score published yet

Exploitation: Actively exploited – in CISA KEV since 03/03/2022
KEV deadline: 03/24/2022
EPSS: 7.3% chance of exploitation in 30 days – higher than 94% of CVEs

What to do

CISA required action

Apply updates per vendor instructions.

nvd.nist.gov/vuln/detail/CVE-2017-6744 (opens in a new tab)

Description

CVE-2017-6744 is a high-severity vulnerability in the SNMP subsystem of Cisco IOS software that allows an authenticated remote attacker to execute code or cause the system to reload by sending a crafted SNMP packet over IPv4 or IPv6. This vulnerability has been exploited in the wild.

Summary

The Simple Network Management Protocol (SNMP) subsystem in Cisco IOS software contains a vulnerability (CVE-2017-6744) that permits an authenticated remote attacker to execute arbitrary code or trigger a system reload by sending a specially crafted SNMP packet via IPv4 or IPv6. This vulnerability is associated with CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer). Exploitation requires authentication and network access to the SNMP service. The vulnerability has been observed in active exploitation campaigns.

Impact

Successful exploitation allows an authenticated remote attacker to execute arbitrary code on the affected Cisco IOS device or cause it to reload, potentially leading to denial of service or unauthorized control of the device. This can disrupt network operations and compromise device integrity.

Mitigation

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official patch or workaround information is provided, users should monitor Cisco advisories for updates and consider restricting SNMP access to trusted management hosts only as a precaution.

Weaknesses

CWE-119Buffer Errors (Memory Bounds) (opens in a new tab)

What to do

Description

AnalysisAI-generated, updated 10/24/2026, 10:40:30 UTC

Weaknesses

References

Related threats