CVE-2018-14847
Published: December 1, 2021
Official Description
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 KEV Advisory
MikroTik Router OS Directory Traversal Vulnerability
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.
Apply updates per vendor instructions.
Risk Analysis
MikroTik RouterOS through version 6.42 contains a directory traversal vulnerability in the WinBox interface. This flaw allows unauthenticated remote attackers to read arbitrary files and authenticated attackers to write arbitrary files. The high EPSS score of 0.93645 indicates a significant likelihood of exploitation, demanding urgent action. This vulnerability is confirmed to be actively exploited, as it is in the KEV.
This vulnerability is actively being exploited in the wild. Unauthenticated attackers can remotely read files, and authenticated attackers can write files via the WinBox interface.
Update MikroTik RouterOS to a patched version. Restrict access to the WinBox interface and ensure strong authentication is enforced.
Technical Analysis
CVE-2018-14847 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2018-14847 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Exploit & PoC Resources
All References (1)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2018-14847 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1