CVE-2026-20084

Katalog CVE

CVSS 8.6 · High EPSS 0,35%

Kerentanan Uncontrolled Resource Consumption pada cisco ios xe. Skor CVSS 3.1 8.6 (High) menurut cisco.com.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD

25 Maret 2026

Terakhir diubah

28 September 2026

Status NVD

Analyzed

CVSS 3.1

8.6 (High), sumber cisco.com
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-400: Uncontrolled Resource Consumption

EPSS (30 hari)

0,35% peluang dieksploitasi; lebih tinggi dari 27,2% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD. Ditampilkan 60 dari 107 konfigurasi; daftar lengkap ada di NVD.

Referensi dan perbaikan

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-bootp-WuBhNBxA advisory vendor