Vulnerability in Mikrotik Routeros

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 · last modified .

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.011 (63.1th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 63.1% 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-2019-3977: held from 0.011 to 0.011.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

  • Mikrotik Routeros
  • Mikrotik Routeros — versions RouterOS 6.45.6 Stable and below. RouterOS 6.44.5 Long-term and below.

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2019-3977?
CVE-2019-3977 is a high-severity vulnerability in Mikrotik Routeros, classified under Download of Code Without Integrity Check. CVSS score: 7.5/10. Published 2019-10-29.
How severe is CVE-2019-3977?
High severity. CVSS v3 base score is 7.5 out of 10.