CVE-2026-33779

An Improper Following of a Certificate's Chain of Trust vulnerability in J-Web of Juniper Networks Junos OS on SRX Series allows a PITM to intercept the communication of the device and get access to confidential information and potentially modify it. When an SRX device is provisioned to connect to Security Director (SD) cloud, it doesn't perform sufficient verification of the received server certificate. This allows a PITM to intercept the communication between the SRX and SD cloud and access credentials and other sensitive information. This issue affects Junos OS: * all versions before 22.4R3-S9, * 23.2 versions before 23.2R2-S6, * 23.4 versions before 23.4R2-S7, * 24.2 versions before 24.2R2-S3, * 24.4 versions before 24.4R2-S2, * 25.2 versions before 25.2R1-S2, 25.2R2.

Scoring

Severity

HIGH

CVSS base score

8.3

CVSS vector

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/RE:M

EPSS probability

0.12%

CWE

CWE-296

Published

2026-04-09

Last modified

2026-04-13

Affected products

• Juniper Networks Junos OS
• Juniper Networks Junos OS
• Juniper Networks Junos OS
• Juniper Networks Junos OS
• Juniper Networks Junos OS
• Juniper Networks Junos OS

Weakness type

• CWE-296

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