Vulnerability Database

309,234

Total vulnerabilities in the database

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.

  • Published: Oct 29, 2019
  • Updated: Nov 9, 2025
  • CVE: CVE-2019-3977
  • Severity: High
  • Exploit:

CVSS v3:

  • Severity: High
  • Score: 7.5
  • AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS v2:

  • Severity: High
  • Score: 8.5
  • AV:N/AC:L/Au:N/C:N/I:C/A:P

CWEs:

Software From Fixed in
mikrotik / routeros - 6.44.5.x
mikrotik / routeros - 6.45.6.x