What is CVE-2026-33790?

CVE-2026-33790 is a high-severity vulnerability in Juniper Networks Junos Os, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 7.5/10. Published 2026-04-09.

How severe is CVE-2026-33790?

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

Vulnerability in Juniper Networks Junos Os

CVE-2026-33790

An Improper Check for Unusual or Exceptional Conditions vulnerability in the flow daemon (flowd) of Juniper Networks Junos OS on SRX Series allows an attacker sending a specific, malformed ICMPv6 packet to cause the srxpfe process to crash…

EPSS: 0.001 (19.0th 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 Networks Junos Os — versions 0, 21.4, 22.2

Weakness classification (CWE)

CWE-754 — Improper Check for Unusual or Exceptional Conditions

References

kb.juniper.net/JSA107874 (vendor-advisory)

Frequently asked questions

What is CVE-2026-33790?: CVE-2026-33790 is a high-severity vulnerability in Juniper Networks Junos Os, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 7.5/10. Published 2026-04-09.
How severe is CVE-2026-33790?: High severity. CVSS v3 base score is 7.5 out of 10.