What is CVE-2026-57027?

CVE-2026-57027 is a medium-severity vulnerability in Juniper Networks Junos Os, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 6.5/10. Published 2026-07-09.

How severe is CVE-2026-57027?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Juniper Networks Junos Os

CVE-2026-57027

A Missing Release of Memory after Effective Lifetime vulnerability in the packet forwarding engine (pfe) of Juniper Networks Junos OS on specific EX Series devices allows an unauthenticated adjacent attacker to cause a Denial-of-Service (D…

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Juniper Networks Junos Os — versions 0, 23.4, 24.2

Weakness classification (CWE)

CWE-401 — Missing Release of Memory after Effective Lifetime

References

sirt@juniper.net (vendor-advisory)

Frequently asked questions

What is CVE-2026-57027?: CVE-2026-57027 is a medium-severity vulnerability in Juniper Networks Junos Os, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 6.5/10. Published 2026-07-09.
How severe is CVE-2026-57027?: Medium severity. CVSS v3 base score is 6.5 out of 10.