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CVE-2025-20141

Cisco IOS XR Software Release 7.9.2 Denial of Service Vulnerabillity

Published: Mar 12, 2025Updated: Aug 6, 2025 Sources: CVE List NVD BDUCWE-770
NVD MITRE
7.4CVSSHIGH
EPSS Score
0.2%
Top 86.9%
CISA KEV
Not in KEV
Exploits
0 Known
Remediation
Patch Available

Description

A vulnerability in the handling of specific packets that are punted from a line card to a route processor in Cisco IOS XR Software Release 7.9.2 could allow an unauthenticated, adjacent attacker to cause control plane traffic to stop working on multiple Cisco IOS XR platforms.  This vulnerability is due to incorrect handling of packets that are punted to the route processor. An attacker could exploit this vulnerability by sending traffic, which must be handled by the Linux stack on the route processor, to an affected device. A successful exploit could allow the attacker to cause control plane traffic to stop working, resulting in a denial of service (DoS) condition.

CVSS Vector Breakdown

AV:AAC:LPR:NUI:NS:CC:NI:NA:H
Exploitability
AV:AAttack Vector
Adjacent
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-770

Affected Products

ios xrcisco
EmbeddedNetwork Device
Networking Infrastructure / router-switch
Cisco IOS XR SoftwareCisco
On-premNetwork Device
Networking Infrastructure / router-switch
Cisco IOS XRCisco Systems Inc.
On-premNetwork Device
Networking Infrastructure / router-switch
ciscocommercialUSNetworking Infrastructureaka cisco systems, cisco systems inc.
cisco systems inc.commercialUSNetworking Infrastructureaka cisco systems, cisco

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

0 exploit sources identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available

MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

https://blog.apnic.net/2024/09/02/crafting-endless-as-paths-in-bgp/
blog.apnic.net
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xr792-bWfVDPY
sec.cloudapps.cisco.com
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xr792-bWfVDPY
sec.cloudapps.cisco.com

Timeline

Published
Mar 12, 2025
Last Updated
Aug 6, 2025

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