Path Traversal in Mikrotik Routeros

CVE-2019-3943

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).

Published · last modified .

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.037 (89.5th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 90th percentile — 89.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2019-3943: held from 0.037 to 0.037.

EPSS over last 30 days · oldest: 0.037 · newest: 0.037 · change: 0.000

Affected products

  • Mikrotik Routeros — versions 6.43, Long-term 6.42.12 and below, Stable 6.43.12 and below

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2019-3943?
CVE-2019-3943 is a high-severity vulnerability in Mikrotik Routeros, classified under Relative Path Traversal. CVSS score: 8.1/10. Published 2019-04-10.
How severe is CVE-2019-3943?
High severity. CVSS v3 base score is 8.1 out of 10.
Is CVE-2019-3943 known to be exploited?
2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.