# CVE-2017-12233: Cisco IOS Software Common Industrial Protocol Request Denial-of-Service Vulnerability

> CVE-2017-12233: Cisco IOS Software Common Industrial Protocol Request Denial-of-Service Vulnerability. CVSS 7.5 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2017-12233
Last updated: 2026-01-12T21:41:58Z

- Published: 2017-09-28 07:00 UTC · Updated: 2026-01-12 21:41 UTC · Assigner: cisco
- CVSS: 7.5 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS: 7.1%, 94th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2022-03-03, federal due date 2022-03-24, ransomware use: Unknown
- CWE: CWE-20

## Description

Multiple vulnerabilities in the implementation of the Common Industrial Protocol (CIP) feature in Cisco IOS 12.4 through 15.6 could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerabilities are due to the improper parsing of crafted CIP packets destined to an affected device. An attacker could exploit these vulnerabilities by sending crafted CIP packets to be processed by an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. Cisco Bug IDs: CSCuz95334.

## CISA required action

Apply updates per vendor instructions.

## Affected vendors and products

- n/a: Cisco IOS

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2017-12233)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2017-12233)
- [https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170927-cip](https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170927-cip)
- [http://www.securityfocus.com/bid/101038](http://www.securityfocus.com/bid/101038)
- [http://www.securitytracker.com/id/1039459](http://www.securitytracker.com/id/1039459)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2017-12233 · Markdown: https://rewindex.com/cve/CVE-2017-12233.md · JSON: https://rewindex.com/api/v1/cves/CVE-2017-12233 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:45:43.603Z