CVE-2025-6443

Mikrotik RouterOS VXLAN Source IP Improper Access Control Vulnerability

Description

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.

Category

7.2
CVSS
Severity: High
CVSS 3.0 •
EPSS 0.16%
Affected: Mikrotik RouterOS
Published at:
Updated at:

References

Link Tags
https://www.zerodayinitiative.com/advisories/ZDI-25-424/

Frequently Asked Questions

What is the severity of CVE-2025-6443?
CVE-2025-6443 has been scored as a high severity vulnerability.
How to fix CVE-2025-6443?
To fix CVE-2025-6443, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-6443 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-6443 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-6443?
CVE-2025-6443 affects Mikrotik RouterOS.
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