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Vulnerability record · CVE-2019-3924 · published 20 February 2019

CVE-2019-3924: Mikrotik routeros vulnerability

Mikrotik · Routeros

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.

7.5 CVSS 3.1 High EPSS 16% · top 3.3% CWE-441 · CWE-441
7.5CVSS 3.1 base score, v2 5.0
16%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 4 tagged exploit
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2019-3924), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.