CVE-2019-3924

Name: CVE-2019-3924
Creator: NVD / NIST
Published: 2019-02-20T20:29:03.047+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 15.70%

Last modified Jun 17, 2026

CVE-2019-3924 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 15.70% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

15.70%

96.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Mikrotik	Routeros	< 6.42.12
Mikrotik	Routeros	< 6.43.12

References

http://www.securityfocus.com/bid/107177Third Party Advisory, VDB Entry
https://www.exploit-db.com/exploits/46444/Exploit, Third Party Advisory, VDB Entry
https://www.tenable.com/security/research/tra-2019-07Exploit, Third Party Advisory
http://www.securityfocus.com/bid/107177Third Party Advisory, VDB Entry
https://www.exploit-db.com/exploits/46444/Exploit, Third Party Advisory, VDB Entry
https://www.tenable.com/security/research/tra-2019-07Exploit, Third Party Advisory

Timeline

Published: Feb 20, 2019
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2019-3924?

How severe is CVE-2019-3924?

CVE-2019-3924 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 15.70% probability of exploitation in the next 30 days.

How do I fix CVE-2019-3924?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-3924?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST