CVE-2026-33779: Junos OS: SRX Series: Insufficient certificate verification for device to SD cloud communication
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.
Affected Software
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Event History
Frequently Asked Questions
What is the severity of CVE-2026-33779?
CVE-2026-33779 has been classified with a severity level that highlights a significant risk of a man-in-the-middle attack due to insufficient certificate validation.
How do I fix CVE-2026-33779?
To mitigate CVE-2026-33779, it is recommended to apply the latest firmware updates for Junos OS on affected SRX Series devices.
Which versions of Junos OS are affected by CVE-2026-33779?
CVE-2026-33779 affects multiple versions of Junos OS for SRX Series including versions 22.4R3-S9, 23.2, 23.4, 24.2, and 25.2.
What type of vulnerability is CVE-2026-33779?
CVE-2026-33779 is categorized as an Improper Following of a Certificate's Chain of Trust vulnerability.
What can attackers potentially do with CVE-2026-33779?
Exploiting CVE-2026-33779, attackers can intercept communications between devices and cloud services, potentially gaining unauthorized access to sensitive configurations.