CVE-2018-0167: in the CISA KEV catalogue
Cisco IOS, XR, and XE Software Buffer Overflow Vulnerability. CISA added CVE-2018-0167 to the Known Exploited Vulnerabilities catalogue on 2022-03-03 with a default due date of 2022-03-17. Known ransomware campaign use: Unknown. Forensic triage flag: No.
There is a buffer overflow vulnerability in the Link Layer Discovery Protocol (LLDP) subsystem of Cisco IOS Software, Cisco IOS XE Software, and Cisco IOS XR Software which could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition or execute arbitrary code. (CISA description)
- Vendor / product
- Cisco IOS, XR, and XE Software
- CWE
- CWE-119
- CISA required action
- Apply updates per vendor instructions.
- EPSS
- 3.4%, percentile 88 (scored 2026-11-03)
EPSS puts about 3.4 in 100 odds (3.4%) on exploitation activity being observed in the next 30 days. Its score is higher than or equal to that of 88% of scored CVEs. This is a model estimate about exploitation anywhere, not about your environment.
Vendor and reference links (from CISA)
Your own deadline under CISA BOD 26-04 depends on exposure, automatability and technical impact: work it out with the BOD 26-04 calculator.
Frequently asked questions
Is CVE-2018-0167 in the CISA KEV catalogue?
Yes. CISA added CVE-2018-0167 (Cisco IOS, XR, and XE Software Buffer Overflow Vulnerability) to the Known Exploited Vulnerabilities catalogue on 2022-03-03. CISA's default due date for it is 2022-03-17.
Is CVE-2018-0167 used in ransomware attacks?
CISA marks known ransomware campaign use as Unknown for CVE-2018-0167. That means CISA lacks confirmation, not that ransomware groups do not use it.
What should I do about CVE-2018-0167?
CISA's required action: Apply updates per vendor instructions.
Sources
- CISA, Known Exploited Vulnerabilities Catalog (accessed 2026-11-03)
- FIRST, Exploit Prediction Scoring System (EPSS) (EPSS by FIRST; scores generated by Empirical Security)
- NVD record for CVE-2018-0167