Is CVE-2019-3943 actively exploited?

No active exploitation of CVE-2019-3943 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2019-3943 be exploited remotely?

Yes. CVE-2019-3943 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2019-3943?

CVE-2019-3943 has a CVSS score of 8.1 (HIGH).

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HIGH

CVE-2019-3943

CWE-23Published: April 10, 2019· Updated: Jun 17, 2026

8.1

CVSS v3.1

Official Description

MikroTik RouterOS versions Stable 6.43.12 and below, Long-term 6.42.12 and below, and Testing 6.44beta75 and below are vulnerable to an authenticated, remote directory traversal via the HTTP or Winbox interfaces. An authenticated, remote attack can use this vulnerability to read and write files outside of the sandbox directory (/rw/disk).

NVD Source

Technical Analysis

CVE-2019-3943 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), with a CVSS base score of 8.1.