What is the severity of CVE-2025-20162?

CVE-2025-20162 has a high severity rating as it can lead to a denial of service (DoS) condition.

How do I fix CVE-2025-20162?

To fix CVE-2025-20162, update your Cisco IOS XE Software to the latest version that addresses this vulnerability.

What type of attack does CVE-2025-20162 enable?

CVE-2025-20162 enables a denial of service (DoS) attack by causing a full interface queue wedge.

Who is affected by CVE-2025-20162?

Organizations using Cisco IOS XE Software with DHCP snooping enabled are affected by CVE-2025-20162.

Can CVE-2025-20162 be exploited remotely?

Yes, CVE-2025-20162 can be exploited by an unauthenticated, remote attacker.

Vulnerability/
CVE-2025-20162

high

8.6

CWE

400

7/5/2025

8/5/2025

CVE-2025-20162

First published: Wed May 07 2025(Updated: )

A vulnerability in the DHCP snooping security feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a full interface queue wedge, which could result in a denial of service (DoS) condition. This vulnerability is due to improper handling of DHCP request packets. An attacker could exploit this vulnerability by sending DHCP request packets to an affected device. A successful exploit could allow the attacker to cause packets to wedge in the queue, creating a DoS condition for downstream devices of the affected system and requiring that the system restart to drain the queue. Note: This vulnerability can be exploited with either unicast or broadcast DHCP packets on a VLAN that does not have DHCP snooping enabled.

Credit: psirt@cisco.com

Affected Software	Affected Version	How to fix
Cisco IOS XE

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Reference Links

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-dhcpsn-dos-xBn8Mtks

Frequently Asked Questions

What is the severity of CVE-2025-20162?
CVE-2025-20162 has a high severity rating as it can lead to a denial of service (DoS) condition.
How do I fix CVE-2025-20162?
To fix CVE-2025-20162, update your Cisco IOS XE Software to the latest version that addresses this vulnerability.
What type of attack does CVE-2025-20162 enable?
CVE-2025-20162 enables a denial of service (DoS) attack by causing a full interface queue wedge.
Who is affected by CVE-2025-20162?
Organizations using Cisco IOS XE Software with DHCP snooping enabled are affected by CVE-2025-20162.
Can CVE-2025-20162 be exploited remotely?
Yes, CVE-2025-20162 can be exploited by an unauthenticated, remote attacker.

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