CVE-2026-33779 Junos OS: SRX Series: Insufficient certificate verification for device to SD cloud communication

High 8.3 Published 9 Apr 2026 Updated 13 Apr 2026

Attackers can intercept and modify Junos OS SRX communications with Security Director cloud due to insufficient certificate verification, exposing sensitive data.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-33779?

CVE-2026-33779 is a high-severity vulnerability in Juniper Junos, published on 9 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Weakness: CWE-296

Which versions are affected by CVE-2026-33779?

It affects 1 product.

Products include Juniper Junos.

How do I fix CVE-2026-33779?

No fix has been published for CVE-2026-33779 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-33779 being exploited?

There is no known exploitation of CVE-2026-33779 in the wild and no public exploit code.

All Juniper Junos vulnerabilities

Sources

Also known as GHSA-9hcr-jp7m-44jv.