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
| Link | Resource |
|---|---|
| https://supportportal.juniper.net/JSA110081 | Vendor Advisory |
Configurations
Configuration 1 (hide)
| AND |
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History
25 Oct 2026, 15:10
| Type | Values Removed | Values Added |
|---|---|---|
| Summary |
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Information
Published : 2026-07-09 22:17
Updated : 2026-10-25 15:10
NVD link : CVE-2026-57021
Mitre link : CVE-2026-57021
CVE.ORG link : CVE-2026-57021
JSON object : View
Products Affected
juniper
- srx4120
- srx440
- srx5400
- srx5800
- srx300
- srx4300
- srx340
- srx4600
- junos
- srx4700
- srx1600
- srx345
- srx5600
- srx320
- srx1500
- srx400
- srx4100
- srx4200
- srx380
- srx2300
CWE
CWE-787
Out-of-bounds Write