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CVE-2026-33797

nvd nist
Published: Apr 9, 2026Modified: Jun 17, 2026

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7.1
Vector
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:A/V:C/RE:M/U:Green
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CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:A/V:C/RE:M/U:GreenShow less
Source: sirt@juniper.net (Secondary)

Description

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 does not affect Junos OS versions before 25.2R1. This issue affects Junos OS Evolved: * 25.2-EVO versions before 25.2R2-EVO This issue does not affect Junos OS Evolved versions before 25.2R1-EVO. eBGP and iBGP are affected. IPv4 and IPv6 are affected.

Affected (8)

Juniper
2 products
Junos
Junos Os Evolved
Configuration A
8 vulnerable
Vulnerable SoftwareAffected Versions
Juniper
Junos
Version 25.2
Junos
Version 25.2 r1-s1
Junos
Version 25.2 r1-s2
Junos
Version 25.2 r1
Juniper
Junos Os Evolved
Version 25.2
Junos Os Evolved
Version 25.2 r1-s1
Junos Os Evolved
Version 25.2 r1-s2
Junos Os Evolved
Version 25.2 r1

Related CWEs

CWE-20
Improper Input Validation
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

References (2)

Source: sirt@juniper.net
Vendor Advisory
Source: sirt@juniper.net

Timeline

No history available yet.