CVE-2018-0161: in the CISA KEV catalogue
Cisco IOS Software Resource Management Errors Vulnerability. CISA added CVE-2018-0161 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.
A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco IOS Software running on certain models of Cisco Catalyst Switches could allow an authenticated, remote attacker to cause a denial-of-service (DoS) condition. (CISA description)
- Vendor / product
- Cisco IOS Software
- CWE
- CWE-399
- CISA required action
- Apply updates per vendor instructions.
- EPSS
- 4.1%, percentile 90 (scored 2026-11-03)
EPSS puts about 4.1 in 100 odds (4.1%) on exploitation activity being observed in the next 30 days. Its score is higher than or equal to that of 90% 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-2018-0161 in the CISA KEV catalogue?
Yes. CISA added CVE-2018-0161 (Cisco IOS Software Resource Management Errors Vulnerability) to the Known Exploited Vulnerabilities catalogue on 2022-03-03. CISA's default due date for it is 2022-03-17.
Is CVE-2018-0161 used in ransomware attacks?
CISA marks known ransomware campaign use as Unknown for CVE-2018-0161. That means CISA lacks confirmation, not that ransomware groups do not use it.
What should I do about CVE-2018-0161?
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-2018-0161