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

Source: https://junglewise.ai/threats/cve-2017-12233-cisco-ios-software-common-industrial-protocol-request-denial-of  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2022-03-03. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2017-12233 · Severity: critical · CVSS 7.5 · Exploited in the wild · Published 2022-03-03

A vulnerability in the Common Industrial Protocol (CIP) feature of Cisco IOS allows an unauthenticated, remote attacker to cause a denial of service. The issue stems from improper parsing of crafted CIP packets, which can trigger a device reload.

Technologies: [Cisco IOS](https://junglewise.ai/threats/technologies/ios), [Cisco Ios Software](https://junglewise.ai/threats/technologies/ios-software), [Cisco IOS XE](https://junglewise.ai/threats/technologies/ios-xe). Vendors: [Cisco](https://junglewise.ai/threats/vendors/cisco).

## Quick answers

**Is CVE-2017-12233 exploited in the wild?** Yes. CVE-2017-12233 is known to be exploited in the wild, first recorded on 3 March 2022. Treat it as urgent.

**How severe is CVE-2017-12233?** Critical severity, with a CVSS score of 7.5, published 3 March 2022.

**Which products and versions are affected?** Cisco IOS 12.4 through 15.6.

**Is there a fix for CVE-2017-12233?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2017-12233 attacked?** It is attacked over the network, in an operating system.

**Am I affected by CVE-2017-12233?** Check whether you run Cisco IOS, Cisco Ios Software or Cisco IOS XE. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Cisco IOS 12.4 through 15.6

## Timeline

- 2017-09-27: disclosed: Original Cisco advisory date
- 2022-03-03: kev added: Added to CISA Known Exploited Vulnerabilities Catalog

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