CVE-2026-20074

Katalog CVE

CVSS 7.4 · High EPSS 0,17%

Kerentanan Improper Validation of Specified Type of Input pada cisco ios xr. Skor CVSS 3.1 7.4 (High) menurut cisco.com.

Deskripsi (NVD)

A vulnerability in the Intermediate System-to-Intermediate System (IS-IS) multi-instance routing feature of Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to cause the IS-IS process to restart unexpectedly. This vulnerability is due to insufficient input validation of ingress IS-IS packets. An attacker could exploit this vulnerability by sending crafted IS-IS packets to an affected device after forming an adjacency. A successful exploit could allow the attacker to cause the IS-IS process to restart unexpectedly, resulting in a temporary loss of connectivity to advertised networks and a denial of service (DoS) condition. Note: The IS-IS protocol is a routing protocol. To exploit this vulnerability, an attacker must be Layer 2-adjacent to the affected device and must have formed an adjacency.  

Rincian

Terbit di NVD

11 Maret 2026

Terakhir diubah

8 Juli 2026

Status NVD

Analyzed

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-1287: Improper Validation of Specified Type of Input

EPSS (30 hari)

0,17% peluang dieksploitasi; lebih tinggi dari 5,5% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-isis-dos-kDMxpSzK mitigasi · advisory vendor