Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2025-20209

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
12/03/2025
Last modified:
01/08/2025

Description

A vulnerability in the Internet Key Exchange version 2 (IKEv2) function of Cisco IOS XR Software could allow an unauthenticated, remote attacker to prevent an affected device from processing any control plane UDP packets.&amp;nbsp;<br /> <br /> This vulnerability is due to improper handling of malformed IKEv2 packets. An attacker could exploit this vulnerability by sending malformed IKEv2 packets to an affected device. A successful exploit could allow the attacker to prevent the affected device from processing any control plane UDP packets, resulting in a denial of service (DoS) condition.<br /> Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

Impact

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:o:cisco:ios_xr:6.5.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.5.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.5.3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.6.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.6.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.6.3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.6.25:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.0.0:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.0.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.0.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.1.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.1.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.2.0:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.2.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:7.2.2:*:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools