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Vulnerabilities

Vulnerability · 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…

Published Apr 10, 2019 · catalog updated Jun 17, 2026 · the affected product

Last checked Nov 9, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2019-3943. EPSS is 3.67%. Act only if a listed version of the affected product is installed.

Gaps on this record

  • No plain product name is stored. The page cannot tell you which product to check.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High8.1
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
3.67%
Remediation
Version ranges on file
Affected products
cpe mikrotik/routeros

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).

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe mikrotik/routeros6.41
  • cpe mikrotik/routeros<= 6.42.12
  • cpe mikrotik/routeros<= 6.43.12

How to fix CVE-2019-3943

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2019-3943. EPSS is 3.67%. Act only if a listed version of the affected product is installed.

Which versions are affected?

Compare what you have installed with 6.41, <= 6.42.12, <= 6.43.12. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-22: Path Traversal; CWE-23. EPSS 3.67%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

MikroTik RouterOS security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 10, 2019 · Monitored products — high

    Detected

    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).

  2. Jun 17, 2026 · Monitored products — high

    Updated

    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).

Sources

  • CVE.orgVulnerability recordCVE-2019-3943

    Official CVE identifier

    cve.org
  • Monitored products — highVendor advisoryCVE-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).

    nvd.nist.gov

References

Freshness

Last verified in this catalog Nov 9, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgNov 6, 2026
  • Monitored products — highNov 6, 2026