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NVD HIGH: CVE-2026-33797 — An Improper Input Validation vulnerability in Juniper Networks Junos OS and Juno...

·Source: NIST NVD

Updated:

Executive Summary

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 session causing a Denial of Service (DoS). An attacker repeatedly sending the packet will sustain the Denial of Service (DoS).This issue affects Junos OS: * 25.2

Analysis

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 session causing a Denial of Service (DoS). An attacker repeatedly sending the packet will sustain the Denial of Service (DoS).This issue affects Junos OS: * 25.2 versions before 25.2R2 This issue doesn't not affected Junos OS versions before 25.2R1. This issue affects Junos OS Evolved: * 25.2-EVO versions before 25.2R2-EVO This issue doesn't not affected Junos OS Evolved versions before 25.2R1-EVO. eBGP and iBGP are affected. IPv4 and IPv6 are affected. CVSS Score: 7.4. Published: 2026-04-09T22:16:29.547.

Indicators of Compromise (1)

CVE (1)
CVE-2026-33797
NVDMITRE CVE
Source Attribution

Originally published by NIST NVD on Apr 9, 2026. Verified by: NIST.

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