Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2025-13086

Severity CVSS v4.0:
MEDIUM
Type:
Unavailable / Other
Publication date:
03/12/2025
Last modified:
30/01/2026

Description

Improper validation of source IP addresses in OpenVPN version 2.6.0 through 2.6.15 and 2.7_alpha1 through 2.7_rc1 allows an attacker to open a session from a different IP address which did not initiate the connection resulting in a denial of service for the originating client

Impact

Vector 4.0
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U CVSS v4.0 Severity and Metrics:

Base Score: 4.60 MEDIUM
Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U

Attack Vector (AV): Network
Attack Complexity (AC): High
Attack Requirements (AT): Present
Privileges Required (PR): None
User Interaction (UI): None
Confidentiality (VC): None
Integrity (VI): None
Availability (VA): High
Confidentiality (SC): None
Integrity (SI): None
Availability (SA): None
Exploit Maturity (E): Unreported

Base Score 4.0
4.60
Severity 4.0
MEDIUM
Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
7.50
Severity 3.x
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:openvpn:openvpn:*:*:*:*:community:*:*:* 2.6.0 (including) 2.6.16 (excluding)
cpe:2.3:a:openvpn:openvpn:2.7:alpha1:*:*:community:*:*:*
cpe:2.3:a:openvpn:openvpn:2.7:alpha2:*:*:community:*:*:*
cpe:2.3:a:openvpn:openvpn:2.7:alpha3:*:*:community:*:*:*
cpe:2.3:a:openvpn:openvpn:2.7:beta1:*:*:community:*:*:*
cpe:2.3:a:openvpn:openvpn:2.7:beta2:*:*:community:*:*:*
cpe:2.3:a:openvpn:openvpn:2.7:beta3:*:*:community:*:*:*
cpe:2.3:a:openvpn:openvpn:2.7:rc1:*:*:community:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools