CVE-2026-20171

Katalog CVE

CVSS 6.8 · Medium EPSS 0,47%

Kerentanan Always-Incorrect Control Flow Implementation. Skor CVSS 3.1 6.8 (Medium) menurut cisco.com.

Deskripsi (NVD)

A vulnerability in the Border Gateway Protocol (BGP) enforce-first-as feature of Cisco Nexus 3000 Series Switches and Cisco Nexus 9000 Series Switches in standalone NX-OS mode could allow an unauthenticated, remote attacker to trigger BGP peer flaps, resulting in a denial of service (DoS) condition. This vulnerability is due to incorrect parsing of a transitive BGP attribute. An attacker could exploit this vulnerability by sending a crafted BGP update through an established BGP peer session. If the update propagates to an affected device, it could cause the device to drop the BGP session and flap with the BGP peer that is forwarding this update, resulting in a DoS condition.

Rincian

Terbit di NVD

20 Mei 2026

Terakhir diubah

23 Juli 2026

Status NVD

Awaiting Analysis

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-670: Always-Incorrect Control Flow Implementation

EPSS (30 hari)

0,47% peluang dieksploitasi; lebih tinggi dari 38,6% CVE lain

Produk dan versi terdampak

NVD belum mencantumkan data produk (CPE) untuk CVE ini. Produk yang terdampak biasanya disebut di deskripsi dan di advisory vendor pada daftar referensi.

Referensi dan perbaikan

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-bgp-iefab-3hb2pwtx