# CVE-2018-0175: Cisco IOS, XR, and XE Software Buffer Overflow Vulnerability

Source: https://junglewise.ai/threats/cve-2018-0175-cisco-ios-xr-and-xe-software-buffer-overflow-vulnerability  
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-2018-0175 · Severity: critical · CVSS 8 · Exploited in the wild · Published 2022-03-03

A format string vulnerability in the Link Layer Discovery Protocol (LLDP) subsystem of Cisco IOS, IOS XE, and IOS XR Software allows an unauthenticated, adjacent attacker to cause a denial of service or execute arbitrary code with elevated privileges. The vulnerability is triggered by processing malicious LLDP packets.

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

## Quick answers

**Is CVE-2018-0175 exploited in the wild?** Yes. CVE-2018-0175 is known to be exploited in the wild, first recorded on 3 March 2022. Treat it as urgent.

**How severe is CVE-2018-0175?** Critical severity, with a CVSS score of 8, published 3 March 2022.

**Which products and versions are affected?** Cisco IOS up to (including) 15.6.3m1; Cisco IOS XE up to (including) 15.6.3m1; Cisco IOS XR 15.4(3)m4.1; Rockwell Automation Stratix 5400/5410/5700/5900/8000/8300.

**Is there a fix for CVE-2018-0175?** 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-2018-0175 attacked?** It is attacked from the adjacent network, in an operating system.

**Am I affected by CVE-2018-0175?** Check whether you run Cisco IOS, Cisco IOS XE, Cisco IOS XR or one of the others listed. 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 up to (including) 15.6.3m1
- Cisco IOS XE up to (including) 15.6.3m1
- Cisco IOS XR 15.4(3)m4.1
- Rockwell Automation Stratix 5400/5410/5700/5900/8000/8300

## Timeline

- 2018-03-28: disclosed: Initial Cisco advisory publication
- 2022-03-03: kev added: Added to CISA Known Exploited Vulnerabilities Catalog

## Related threats

- [Cisco IOS XR IPv4 packet processing denial of service](https://junglewise.ai/threats/cve-2026-76505-a-vulnerability-in-the-ipv4-packet-processing-functionality-of)
- [Cisco Snort 3 Detection Engine denial of service in GTP codec](https://junglewise.ai/threats/cve-2026-76445-multiple-cisco-products-are-affected-by-a-vulnerability-in-the)
- [Cisco Snort 3 incorrect calculation vulnerability](https://junglewise.ai/threats/cve-2026-20236-as-part-of-cisco-s-ongoing-commitment-to-proactive-security-and)
- [Cisco Snort 3 out-of-bounds write](https://junglewise.ai/threats/cve-2026-20043-as-part-of-cisco-s-ongoing-commitment-to-proactive-security-and)
- [Cisco IOS XR Software improper neutralization in command processing](https://junglewise.ai/threats/cve-2026-20278-cisco-ios-xr-software-improper-neutralization-in-command)