CVE-2026-39042

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CVSS 3.1

7.5 high

EPSS

<1%p46

Published

Jul 13, 2026 (Jul 13, 2026)

Modified

Jul 15, 2026

Description

An issue in MikroTIk (SIA Mikrotikls, Latvia) RouterOS 7.21.x before v.7.21.4 and 7.22.x before v.7.22.2 allows a remote attacker to cause a denial of service via the unflatten() function in libumsg.so.

Weakness: CWE-190
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD CVE.org GitHub PoCs EPSS (0.6%)

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