Vulnerability · Published Jun 25, 2025 · Assigned by zdi

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

High 7.2

In plain English

A high-severity improper access control in RouterOS from Mikrotik. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 47% of all known vulnerabilities).

Severity (CVSS 3.0)7.2High

Exploit odds (30 days)0.6%top 52.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Mikrotik	RouterOS	7.15.3, 7.16.2

Weakness: CWE-284 · Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

References

ZDI-25-424 x_research-advisory