Description
A vulnerability in the DHCP snooping feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause BOOTP packets to be forwarded between VLANs, resulting in a denial of service (DoS) condition. This vulnerability is due to improper handling of BOOTP packets on Cisco Catalyst 9000 Series Switches. An attacker could exploit this vulnerability by sending BOOTP request packets to an affected device. A successful exploit could allow an attacker to forward BOOTP packets from one VLAN to another, resulting in BOOTP VLAN leakage and potentially leading to high CPU utilization. This makes the device unreachable (either through console or remote management) and unable to forward traffic, resulting in a DoS condition. Note: This vulnerability can be exploited with either unicast or broadcast BOOTP packets. There are workarounds that address this vulnerability.
INFO
Published Date :
2026-03-25T16:02:39.119Z
Last Modified :
2026-03-26T17:35:50.008Z
Source :
cisco
AFFECTED PRODUCTS
The following products are affected by CVE-2026-20084 vulnerability.
| Vendors | Products |
|---|---|
| Cisco |
|
REFERENCES
Here, you will find a curated list of external links that provide in-depth information to CVE-2026-20084.
