High severity · published Jun 25, 2025
CVE-2025-6443
Mikrotik RouterOS VXLAN Source IP Improper Access Control Vulnerability
7.2
CVSS
0.6%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 47% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RO
Routeros · Mikrotik
before 7.20 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-6443
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-6443
Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-25-424/
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