CVE-2026-33779: An Improper Following of a Certificate's Chain of Trust vulnerability in J-Web of Juniper Networks Junos OS on SRX…
CVE-2026-33779 · Severity: medium · CVSS 6.5 · Published 2026-04-09
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.
No. Junglewise Threat Intelligence has no report of CVE-2026-33779 being exploited in the wild.
How severe is CVE-2026-33779?
Medium severity, with a CVSS score of 6.5, published 9 April 2026.
Which products and versions are affected?
Juniper Junos, Juniper Srx1500, Juniper Srx1600, Juniper Srx2300 and 14 more. The advisory does not name versions.
Is there a fix for CVE-2026-33779?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2026-33779?
Check whether you run Juniper Junos, Juniper Srx1500, Juniper Srx1600 or one of the others listed. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.