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Description

A vulnerability in the Address Resolution Protocol (ARP) implementation of Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to trigger a broadcast storm, leading to a denial of service (DoS) condition on an affected device.  This vulnerability is due to how Cisco IOS XR Software processes a high, sustained rate of ARP traffic hitting the management interface. Under certain conditions, an attacker could exploit this vulnerability by sending an excessive amount of traffic to the management interface of an affected device, overwhelming its ARP processing capabilities. A successful exploit could result in degraded device performance, loss of management connectivity, and complete unresponsiveness of the system, leading to a DoS condition.

PUBLISHED Reserved 2024-10-10 | Published 2025-09-10 | Updated 2025-09-10 | Assigner cisco




HIGH: 7.4CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Problem types

Uncontrolled Resource Consumption

Product status

Default status
unknown

6.5.3
affected

6.5.29
affected

6.5.1
affected

6.6.1
affected

6.5.2
affected

6.5.92
affected

6.5.15
affected

6.6.2
affected

7.0.1
affected

6.6.25
affected

6.5.26
affected

6.6.11
affected

6.5.25
affected

6.5.28
affected

6.5.93
affected

6.6.12
affected

6.5.90
affected

7.0.0
affected

7.1.1
affected

7.0.90
affected

6.6.3
affected

6.7.1
affected

7.0.2
affected

7.1.15
affected

7.2.0
affected

7.2.1
affected

7.1.2
affected

6.7.2
affected

7.0.11
affected

7.0.12
affected

7.0.14
affected

7.1.25
affected

6.6.4
affected

7.2.12
affected

7.3.1
affected

7.1.3
affected

6.7.3
affected

7.4.1
affected

7.2.2
affected

6.7.4
affected

6.5.31
affected

7.3.15
affected

7.3.16
affected

6.8.1
affected

7.4.15
affected

6.5.32
affected

7.3.2
affected

7.5.1
affected

7.4.16
affected

7.3.27
affected

7.6.1
affected

7.5.2
affected

7.8.1
affected

7.6.15
affected

7.5.12
affected

7.8.12
affected

7.3.3
affected

7.7.1
affected

6.8.2
affected

7.3.4
affected

7.4.2
affected

6.7.35
affected

6.9.1
affected

7.6.2
affected

7.5.3
affected

7.7.2
affected

6.9.2
affected

7.9.1
affected

7.10.1
affected

7.8.2
affected

7.5.4
affected

6.5.33
affected

7.8.22
affected

7.7.21
affected

7.9.2
affected

7.3.5
affected

7.5.5
affected

7.11.1
affected

7.9.21
affected

7.10.2
affected

24.1.1
affected

7.6.3
affected

7.3.6
affected

7.5.52
affected

7.11.2
affected

24.2.1
affected

24.1.2
affected

24.2.11
affected

24.3.1
affected

24.4.1
affected

24.2.2
affected

7.8.23
affected

7.11.21
affected

24.2.20
affected

24.3.2
affected

24.4.10
affected

6.5.35
affected

25.1.1
affected

24.4.2
affected

24.3.20
affected

24.4.15
affected

6.5.351
affected

24.3.30
affected

6.5.352
affected

24.4.30
affected

References

sec.cloudapps.cisco.com/...cisco-sa-iosxr-arp-storm-EjUU55yM (cisco-sa-iosxr-arp-storm-EjUU55yM)

cve.org (CVE-2025-20340)

nvd.nist.gov (CVE-2025-20340)

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