CVE-2026-33779

| EUVD-2026-21088 HIGH
2026-04-09 juniper GHSA-9hcr-jp7m-44jv
8.3
CVSS 4.0
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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/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:X/R:X/V:X/RE:M/U:X
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

3
EUVD ID Assigned
Apr 09, 2026 - 21:45 euvd
EUVD-2026-21088
Analysis Generated
Apr 09, 2026 - 21:45 vuln.today
CVE Published
Apr 09, 2026 - 21:30 nvd
HIGH 8.3

Tags

Information Disclosure Juniper Junos Os

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.

Analysis

Certificate chain validation bypass in Juniper Junos OS J-Web on SRX Series enables person-in-the-middle attackers to intercept Security Director cloud communications, exposing credentials and sensitive data. All SRX devices connecting to SD cloud fail to properly verify server certificates, allowing interception of authentication material and configuration data. …

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Remediation

Within 24 hours: Inventory all SRX Series devices and verify current Junos OS versions against affected ranges (pre-22.4R3-S9, pre-23.2R2-S6, pre-23.4R2-S7, pre-24.2R2-S3, pre-24.4R2-S2, pre-25.2R1-S2/25.2R2). Within 7 days: Prioritize patching of SRX devices actively connected to Security Director cloud; apply vendor-released patches: 22.4R3-S9, 23.2R2-S6, 23.4R2-S7, 24.2R2-S3, 24.4R2-S2, or 25.2R1-S2/25.2R2 depending on current branch. …

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Priority Score

42
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +42
POC: 0

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CVE-2026-33779 vulnerability details – vuln.today
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