UpHeron
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Servers and applications

CVE-2019-3981

MikroTik Winbox 3.20 and below is vulnerable to man in the middle attacks. A man in the middle can downgrade the client's authentication protocol and recover the user's username and MD5 hashed password.

Severity
Low 3.7
Published
14 Jan 2020
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
6.43
Exploit chance
1.1% in the next 30 daysHigher than 66% of CVEs. EPSS by FIRST, 10 Nov 2026
Sources
NVD

Affected software

SoftwareAffected versions
MikroTik RouterOSServers and applications · cpe:o:mikrotik:routeros
  • Every version before 6.43

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2019-3981
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2019-3981