THREATPORT/VULNERABILITY/CVE-2019-3924
HIGH SEVERITY

CVE-2019-3924

Routeros vulnerability

CVSS
7.5
EPSS
15.7%
EPSS pct
97th
Exploited
No known
MikroTik RouterOS before 6.43.12 (stable) and 6.42.12 (long-term) is vulnerable to an intermediary vulnerability. The software will execute user defined network requests to both WAN and LAN clients. A remote unauthenticated attacker can use this vulnerability to bypass the router's firewall or for general network scanning activities.
Affected vendor
Mikrotik
Affected product
Routeros
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness type (CWE)
Published
2019-02-20

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to confidentiality.

Its EPSS score of 15.7% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 97% of all scored CVEs.

Check your external exposure to CVE-2019-3924

  • Confirm whether Mikrotik Routeros is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2019-3924.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2019-3924

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2019-3924 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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