What is CVE-2018-0167?

CVE-2018-0167 is a high-severity vulnerability in Cisco Asr 9001, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2018-03-28.

How severe is CVE-2018-0167?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2018-0167 known to be exploited?

Yes. CVE-2018-0167 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-03-03), indicating it is being actively exploited. 2 public proof-of-concept repositories are indexed.

Buffer overflow in Cisco Asr 9001

CVE-2018-0167

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.

Vulnerability class: Buffer Overflow

Published 2018-03-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.034 (88.5th percentile), scored 2026-10-19.

Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 88.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.034 · newest: 0.034 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2022-03-03. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2022-03-17.

Required action: Apply updates per vendor instructions.

Public proof-of-concept exploits

References

tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328… (Vendor Advisory)
ics-cert.us-cert.gov/advisories/ICSA-18-107-03 (US Government Resource, Third Party Advisory)
ics-cert.us-cert.gov/advisories/ICSA-18-107-04 (US Government Resource, Third Party Advisory)
www.securitytracker.com/id/1040586 (VDB Entry, Third Party Advisory, vdb-entry, Broken Link)
ics-cert.us-cert.gov/advisories/ICSA-18-107-05 (US Government Resource, Third Party Advisory)
www.securityfocus.com/bid/103564 (VDB Entry, Third Party Advisory, vdb-entry, Broken Link)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2018-0167?: CVE-2018-0167 is a high-severity vulnerability in Cisco Asr 9001, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2018-03-28.
How severe is CVE-2018-0167?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2018-0167 known to be exploited?: Yes. CVE-2018-0167 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-03-03), indicating it is being actively exploited. 2 public proof-of-concept repositories are indexed.