CVE-2018-0167

Name: CVE-2018-0167
Creator: NVD / NIST
Published: 2018-03-28T22:29:00.907+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10Actively ExploitedEPSS 3.45%

Last modified Jun 17, 2026

CVE-2018-0167 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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 has confirmed active exploitation in the wild. EPSS estimates a 3.45% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

3.45%

87.5th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Mar 17, 2022.

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Cisco	Ios	5.2.0.base
Cisco	Ios Xe	5.2.0.base
Cisco	Ios Xr	>= 4.1, < 5.1.3
Cisco	Ios	<= 15.6.3m1
Cisco	Ios Xe	<= 15.6.3m1
Cisco	Ios	<= 15.2\(6\)e0a
Cisco	Ios Xe	<= 15.2\(6\)e0a
Cisco	Ios	<= 15.2\(4a\)ea5
Cisco	Ios Xe	<= 15.2\(4a\)ea5

References

http://www.securityfocus.com/bid/103564Broken Link, Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1040586Broken Link, Third Party Advisory, VDB Entry
https://ics-cert.us-cert.gov/advisories/ICSA-18-107-03Third Party Advisory, US Government Resource
https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04Third Party Advisory, US Government Resource
https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05Third Party Advisory, US Government Resource
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-lldpVendor Advisory
http://www.securityfocus.com/bid/103564Broken Link, Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1040586Broken Link, Third Party Advisory, VDB Entry
https://ics-cert.us-cert.gov/advisories/ICSA-18-107-03Third Party Advisory, US Government Resource
https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04Third Party Advisory, US Government Resource
https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05Third Party Advisory, US Government Resource
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-lldpVendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0167US Government Resource

Timeline

Published: Mar 28, 2018
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2018-0167?

How severe is CVE-2018-0167?

CVE-2018-0167 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 3.45% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2018-0167?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

How Strix Helps

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Source: NVD / NIST