What is CVE-2026-33778?

CVE-2026-33778 is a high-severity vulnerability in Juniper Junos, classified under CWE-1286. CVSS score: 7.5/10. Published 2026-04-09.

How severe is CVE-2026-33778?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Juniper Junos

CVE-2026-33778

An Improper Validation of Syntactic Correctness of Input vulnerability in the IPsec library used by kmd and iked of Juniper Networks Junos OS on SRX Series and MX Series allows an unauthenticated, network-based attacker to cause a complet…

EPSS: 0.003 (26.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Juniper Junos — versions 22.4, 23.2, 23.4
Juniper Mx10004
Juniper Mx10008
Juniper Mx2008
Juniper Mx2010
Juniper Mx2020
Juniper Mx204
Juniper Mx240
Juniper Mx301
Juniper Mx304

Weakness classification (CWE)

CWE-1286

References

sirt@juniper.net (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2026-33778?: CVE-2026-33778 is a high-severity vulnerability in Juniper Junos, classified under CWE-1286. CVSS score: 7.5/10. Published 2026-04-09.
How severe is CVE-2026-33778?: High severity. CVSS v3 base score is 7.5 out of 10.