Answer in brief
CVE-2026-57021 records a Medium severity (CVSS 6.9) vulnerability in Junos OS: SRX Series: If VPN compliance-check is configured an attacker can cause http-gk process crash. The current sources do not mark it as known exploited. The current feed maps Juniper Networks/Junos OS (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 6.9. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Juniper Networks/Junos OS (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:h:juniper:srx1500:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:juniper:srx1600:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:juniper:srx2300:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:juniper:srx300:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:juniper:srx320:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:juniper:srx340:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:juniper:srx345:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:juniper:srx380:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:juniper:srx400:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:juniper:srx4100:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:juniper:srx4120:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:juniper:srx4200:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:juniper:srx4300:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:juniper:srx440:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:juniper:srx4600:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:juniper:srx4700:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:juniper:srx5400:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:juniper:srx5600:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:h:juniper:srx5800:-:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:23.2:-:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:23.2:r1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:23.2:r1-s1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:23.2:r1-s2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:23.2:r2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:23.2:r2-s1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:23.2:r2-s2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:23.2:r2-s3:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:23.2:r2-s4:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:23.2:r2-s5:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:23.2:r2-s6:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:23.4:-:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:23.4:r1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:23.4:r1-s1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:23.4:r1-s2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:23.4:r2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:23.4:r2-s1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:23.4:r2-s2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:23.4:r2-s3:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:23.4:r2-s4:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:23.4:r2-s5:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:23.4:r2-s6:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:23.4:r2-s7:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:24.2:-:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:24.2:r1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:24.2:r1-s1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:24.2:r1-s2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:24.2:r2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:24.2:r2-s1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:24.2:r2-s2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:24.2:r2-s3:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:24.4:-:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:24.4:r1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:24.4:r1-s2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:24.4:r1-s3:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:24.4:r2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:24.4:r2-s1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:24.4:r2-s2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:24.4:r2-s3:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:25.2:-:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:25.2:r1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:25.2:r1-s1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:25.2:r1-s2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:25.4:-:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:juniper:junos:25.4:r1:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Juniper Networks/Junos OSgeneric | >=23.2 <23.2R2-S7 || >=23.4 <23.4R2-S8 || >=24.2 <24.2R2-S4 || >=24.4 <24.4R2-S4 || >=25.2 <25.2R2 || >=25.4 <25.4R1-S1 25.4R2 | 23.2R2-S7, 23.4R2-S8, 24.2R2-S4, 24.4R2-S4, 25.2R2, 25.4R1-S1, 25.4R2, 25.4R1-S1 |
Published upstream
Jul 9, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 10, 2026
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.
Quoted source text, attributed separately from HOL analysis.