CVE-2026-21901

Katalog CVE

CVSS 4.4 · Medium EPSS 0,17%

Kerentanan NULL Pointer Dereference pada juniper junos, juniper junos os evolved. Skor CVSS 3.1 4.4 (Medium) menurut juniper.net.

Deskripsi (NVD)

A NULL Pointer Dereference vulnerability in the management daemon (mgd) of Juniper Networks Junos OS and Junos OS Evolved allows a local, high-privileged attacker setting or deactivating a specific SSH configuration parameter to create a Denial of Service (DoS). A local high-privileged user configuring or deactivating a specific 'system services ssh' configuration parameter can exploit a null pointer dereference in one of the functions used by SSH. The function attempts to dereference a null pointer when accessing certain configuration data, resulting in an mgd process crash and restart. Continued execution of these configuration commands will create a sustained Denial of Service (DoS) condition. This issue affects: Junos OS: * from 22.3 before 22.3R3-S5; * from 22.4 before 22.4R3-S10; * from 23.2 before 23.2R2-S7; * from 23.4 before 23.4R2-S8. This issue does not affect Junos OS before 22.3R1. Junos OS Evolved: * from 22.3R1-EVO before 23.2R2-S7-EVO; * from 23.4 before 23.4R2-S8-EVO. This issue does not affect Junos OS Evolved before 22.3R1-EVO.

Rincian

Terbit di NVD

9 Juli 2026

Terakhir diubah

26 Agustus 2026

Status NVD

Analyzed

CVSS 3.1

4.4 (Medium), sumber juniper.net
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-476: NULL Pointer Dereference

EPSS (30 hari)

0,17% peluang dieksploitasi; lebih tinggi dari 5,3% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD. Ditampilkan 60 dari 104 konfigurasi; daftar lengkap ada di NVD.

Referensi dan perbaikan

• https://supportportal.juniper.net/JSA110072 advisory vendor
• https://github.com/orangecertcc/security-research/security/advisories/GHSA-g4f7-w2rc-hpj6 mitigasi · exploit · advisory pihak ketiga