CVE-2025-6443 HIGH

CVE-2025-6443: Mikrotik RouterOS VXLAN Source IP Improper Access Control Vulnerability

Vendor Mikrotik
Product RouterOS
Weakness CWE-284
Published June 25, 2025
Last update June 26, 2025

CVSS base score

7.2/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality Low
Integrity Low

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

What the vulnerability does

01Description

Mikrotik RouterOS VXLAN Source IP Improper Access Control Vulnerability. This vulnerability allows remote attackers to bypass access restrictions on affected installations of Mikrotik RouterOS. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of remote IP addresses when processing VXLAN traffic. The issue results from the lack of validation of the remote IP address against configured values prior to allowing ingress traffic into the internal network. An attacker can leverage this vulnerability to gain access to internal network resources. Was ZDI-CAN-26415.

Key dates

02Disclosure timeline

June 25, 2025 CVE published
June 26, 2025 Record updated