CVE Watch13 jul 2026

CVE-2026-57021

An Out-of-bounds Write vulnerability in the http-gatekeeper (http-gk) of Juniper Networks Junos OS on SRX Series allows an unauthenticated,

CVSS

5.3

Medio

EPSS

0.5%

p38

KEV

—

Exploit Today

0-100

Publicado: 9 jul 2026 · Última mod.: 13 jul 2026 · CWE-787

EPSS · 30d

0.5%EPSS · 30 días0.5%

2026-07-102026-07-17

Descripción técnica

An Out-of-bounds Write vulnerability in the http-gatekeeper (http-gk) of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS). If an SRX Series device is configured for remote-access VPN with pre-logon compliance check, a network-based attacker sending specifically formatted requests can trigger an out of bounds write leading to an http-gk process crash. This crash leads to unavailability of all services depending on the [ system services web-management ] configuration (like J-Web, remote access VPN and firewall authentication) until the process automatically restarts. This issue affects Junos OS on SRX Series: * 23.2 versions before 23.2R2-S7, * 23.4 versions before 23.4R2-S8, * 24.2 versions before 24.2R2-S4, * 24.4 versions before 24.4R2-S4, * 25.2 versions before 25.2R2, * 25.4 versions before 25.4R1-S1, 25.4R2.

Referencias oficiales

supportportal.juniper.nethttps://supportportal.juniper.net/JSA110081

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