Vulnerability Details 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 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 10.3%
CVSS Severity
CVSS v3 Score 7.4
References
Products affected by CVE-2026-33797
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cpe:2.3:o:juniper:junos:25.2
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cpe:2.3:o:juniper:junos_os_evolved:25.2