Buffer overflow in Juniper Networks Junos Os
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, network-based attacker to cause a Denial-of-Service (DoS). If an SRX Series device is configured f…
Vulnerability class: Buffer Overflow
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
Affected products
- Juniper Networks Junos Os — versions 23.2, 23.4, 24.2
Weakness classification (CWE)
References
- sirt@juniper.net (vendor-advisory)
Frequently asked questions
- What is CVE-2026-57021?
- CVE-2026-57021 is a medium-severity vulnerability in Juniper Networks Junos Os, classified under Out-of-bounds Write. CVSS score: 5.3/10. Published 2026-07-09.
- How severe is CVE-2026-57021?
- Medium severity. CVSS v3 base score is 5.3 out of 10.