PT-2025-11104 · Cisco · Cisco Ios Xr

Published 2025-03-12 · Updated 2025-08-01 · CVE-2025-20209

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions: Cisco IOS XR Software (affected versions not specified)

Description: A vulnerability in the Internet Key Exchange version 2 (IKEv2) function could allow an unauthenticated, remote attacker to prevent an affected device from processing any control plane UDP packets. This issue is due to improper handling of malformed IKEv2 packets. An attacker could exploit this by sending malformed IKEv2 packets to an affected device, potentially resulting in a denial of service (DoS) condition.

Recommendations: At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Allocation of Resources Without Limits

Weakness Enumeration

CWE-770

Related Identifiers

BDU:2025-04301

CVE-2025-20209

Affected Products

Cisco Ios Xr

References · 10

• https://bdu.fstec.ru/vul/2025-04301 · Security Note
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xrike-9wYGpRGq · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-20209 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-20209 · Security Note
• https://blog.apnic.net/2024/09/02/crafting-endless-as-paths-in-bgp · Note
• https://t.me/cveNotify/130552 · Telegram Post
• https://twitter.com/CVEnew/status/1899894890869514256 · Twitter Post
• https://twitter.com/CCBalert/status/1900189830983590027 · Twitter Post
• https://t.me/cvedetector/20161 · Telegram Post
• https://t.me/cvetracker/18999 · Telegram Post