CVE-2017-12233VulnerabilityPublished 03/03/2022Updated 10/24/2026

CVE-2017-12233: Cisco IOS Software Common Industrial Protocol Request Denial-of-Service 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: 7.1% 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-2017-12233 (opens in a new tab)

Description

CVE-2017-12233 is a vulnerability in Cisco IOS software's Common Industrial Protocol (CIP) feature that allows an unauthenticated remote attacker to cause the device to reload, resulting in a denial of service. This vulnerability has been exploited in the wild. No specific affected versions or patch information is provided in the available data.

Summary

The vulnerability exists in the implementation of the Common Industrial Protocol (CIP) feature in Cisco IOS software. An unauthenticated remote attacker can exploit this flaw to cause the affected device to reload, leading to a denial-of-service condition. The vulnerability is tracked as CVE-2017-12233 and has been observed in exploitation in the wild. No detailed version or patch information is provided in the source data.

Impact

Successful exploitation results in a denial of service by causing the affected Cisco IOS device to reload. This disrupts network operations relying on the device. The vulnerability affects availability but does not indicate compromise of confidentiality or integrity in the provided data.

Mitigation

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no patch or workaround information is provided, users should consult Cisco's official advisories for updates and apply any available fixes promptly. Until a patch is applied, consider limiting exposure of the CIP feature to untrusted networks.

Weaknesses

CWE-20Improper Input Validation (opens in a new tab)

What to do

Description

AnalysisAI-generated, updated 10/24/2026, 10:26:59 UTC

Weaknesses

References

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