CVE-2018-14847: in the CISA KEV catalogue
MikroTik Router OS Directory Traversal Vulnerability. CISA added CVE-2018-14847 to the Known Exploited Vulnerabilities catalogue on 2021-12-01 with a default due date of 2022-06-01. Known ransomware campaign use: Unknown. Forensic triage flag: No.
MikroTik RouterOS through 6.42 allows unauthenticated remote attackers to read arbitrary files and remote authenticated attackers to write arbitrary files due to a directory traversal vulnerability in the WinBox interface. (CISA description)
- Vendor / product
- MikroTik RouterOS
- CWE
- CWE-22
- CISA required action
- Apply updates per vendor instructions.
- EPSS
- 96%, percentile 99 (scored 2026-11-03)
EPSS puts about 96 in 100 odds (96%) on exploitation activity being observed in the next 30 days. Its score is higher than or equal to that of 99% 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-2018-14847 in the CISA KEV catalogue?
Yes. CISA added CVE-2018-14847 (MikroTik Router OS Directory Traversal Vulnerability) to the Known Exploited Vulnerabilities catalogue on 2021-12-01. CISA's default due date for it is 2022-06-01.
Is CVE-2018-14847 used in ransomware attacks?
CISA marks known ransomware campaign use as Unknown for CVE-2018-14847. That means CISA lacks confirmation, not that ransomware groups do not use it.
What should I do about CVE-2018-14847?
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-2018-14847