# CVE-2018-0167: Cisco IOS, XR, and XE Software Buffer Overflow Vulnerability

> CVE-2018-0167: Cisco IOS, XR, and XE Software Buffer Overflow Vulnerability. CVSS 8.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2018-0167
Last updated: 2026-01-12T21:58:25Z

- Published: 2018-03-28 22:00 UTC · Updated: 2026-01-12 21:58 UTC · Assigner: cisco
- CVSS: 8.8 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS: 3.4%, 89th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2022-03-03, federal due date 2022-03-17, ransomware use: Unknown
- CWE: CWE-119

## Description

Multiple Buffer Overflow vulnerabilities in the Link Layer Discovery Protocol (LLDP) subsystem of Cisco IOS Software, Cisco IOS XE Software, and Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition or execute arbitrary code with elevated privileges on an affected device. Cisco Bug IDs: CSCuo17183, CSCvd73487.

## CISA required action

Apply updates per vendor instructions.

## Affected vendors and products

- n/a: Cisco IOS, IOS XE, and IOS XR

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2018-0167)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2018-0167)
- [https://ics-cert.us-cert.gov/advisories/ICSA-18-107-03](https://ics-cert.us-cert.gov/advisories/ICSA-18-107-03)
- [https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04](https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04)
- [https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05](https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05)
- [https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-lldp](https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-lldp)
- [http://www.securityfocus.com/bid/103564](http://www.securityfocus.com/bid/103564)
- [http://www.securitytracker.com/id/1040586](http://www.securitytracker.com/id/1040586)

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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-2018-0167 · Markdown: https://rewindex.com/cve/CVE-2018-0167.md · JSON: https://rewindex.com/api/v1/cves/CVE-2018-0167 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:49:21.633Z