CVE-2025-20162: A vulnerability in the DHCP snooping security feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a full...
Description
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.
Classification
CVE ID: CVE-2025-20162
CVSS Base Severity: HIGH
CVSS Base Score: 8.6
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Problem Types
Uncontrolled Resource ConsumptionAffected Products
Vendor: Cisco
Product: Cisco IOS XE Software
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.14% (probability of being exploited)
EPSS Percentile: 35.2% (scored less or equal to compared to others)
EPSS Date: 2025-06-05 (when was this score calculated)
References
https://nvd.nist.gov/vuln/detail/CVE-2025-20162https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-dhcpsn-dos-xBn8Mtks