What is CVE-2026-33797?

CVE-2026-33797 is a high-severity vulnerability in Juniper Networks Junos Os, classified under Improper Input Validation. CVSS score: 7.4/10. Published 2026-04-09.

How severe is CVE-2026-33797?

High severity. CVSS v3 base score is 7.4 out of 10.

Improper input validation in Juniper Networks Junos Os

CVE-2026-33797

An Improper Input Validation vulnerability in Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, adjacent attacker, sending a specific genuine BGP packet in an already established BGP session to reset only that sessi…

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.000 (11.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.

Affected products

Juniper Networks Junos Os — versions 25.2, 0
Juniper Networks Junos Os Evolved — versions 25.2, 0

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

kb.juniper.net/JSA107850 (vendor-advisory)
supportportal.juniper.net/JSA107850 (vendor-advisory)

Frequently asked questions

What is CVE-2026-33797?: CVE-2026-33797 is a high-severity vulnerability in Juniper Networks Junos Os, classified under Improper Input Validation. CVSS score: 7.4/10. Published 2026-04-09.
How severe is CVE-2026-33797?: High severity. CVSS v3 base score is 7.4 out of 10.