UpHeron
All vulnerabilities

Servers and applications

CVE-2019-3977

RouterOS 6.45.6 Stable, RouterOS 6.44.5 Long-term, and below insufficiently validate where upgrade packages are download from when using the autoupgrade feature. Therefore, a remote attacker can trick the router into "upgrading" to an older version of RouterOS and possibly reseting all the system's usernames and passwords.

Severity
High 7.5
Published
29 Oct 2019
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
1.1% in the next 30 daysHigher than 64% of CVEs. EPSS by FIRST, 10 Nov 2026
Sources
NVD

Affected software

SoftwareAffected versions
MikroTik RouterOSServers and applications · cpe:o:mikrotik:routeros
  • Every version up to 6.44.5
  • Every version up to 6.45.6

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2019-3977
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2019-3977