CVE-2026-57021 (GCVE-0-2026-57021)
Vulnerability from cvelistv5
Published
2026-07-09 21:05
Modified
2026-07-10 14:28
Severity ?
5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
6.9 (Medium) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/AU:Y/R:A/RE:M
CWE
Summary
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.
References
Impacted products
Vendor Product Version
Juniper Networks Junos OS Version: 23.2   < 23.2R2-S7
Version: 23.4   < 23.4R2-S8
Version: 24.2   < 24.2R2-S4
Version: 24.4   < 24.4R2-S4
Version: 25.2   < 25.2R2
Version: 25.4   < 25.4R1-S1, 25.4R2
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