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

CVSS 6.5 · Medium EPSS 0.02% · P7
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I. Basic Information for CVE-2026-33779

Vulnerability Information
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Vulnerability Title
Junos OS: SRX Series: Insufficient certificate verification for device to SD cloud communication
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
证书信任链回溯不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Juniper Networks Junos OS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Juniper Networks Junos OS是美国瞻博网络（Juniper Networks）公司的一套专用于该公司的硬件设备的网络操作系统。该操作系统提供了安全编程接口和Junos SDK。 Juniper Networks Junos OS 22.4R3-S9之前版本、23.2R2-S6之前版本、23.4R2-S7之前版本、24.2R2-S3之前版本、24.4R2-S2之前版本和25.2R1-S2及25.2R2之前版本存在安全漏洞，该漏洞源于证书信任链验证不当，可能导致中间人攻击者拦截通信并访问
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
Juniper NetworksJunos OS 0 ~ 22.4R3-S9 -

II. Public POCs for CVE-2026-33779

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III. Intelligence Information for CVE-2026-33779

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Same Patch Batch · Juniper Networks · 2026-04-09 · 26 CVEs total

CVE-2026-337849.8 CRITICALJSI Virtual Lightweight Collector: Default password is not required to be changed which al
CVE-2026-337858.8 HIGHJunos OS: MX Series: Missing Authorization for specific 'request' CLI commands in a JDM/CS
CVE-2025-139148.7 HIGHApstra: SSH host key validation vulnerability for managed devices
CVE-2026-337937.8 HIGHJunos OS and Junos OS Evolved: When an unsigned Python op script configuration is present,
CVE-2026-337887.8 HIGHJunos OS Evolved: Local, authenticated attacker can gain privileged access to FPCs
CVE-2026-337907.5 HIGHJunos OS: SRX Series: In a NAT64 configuration, receipt of a specific, malformed ICMPv6 pa
CVE-2026-337787.5 HIGHJunos OS: SRX Series, MX Series: When a specifically malformed first ISAKMP packet is rece
CVE-2026-337717.4 HIGHCTP OS: Configuring password requirements does not work which permits the use of weak pass
CVE-2026-337977.4 HIGHJunos OS and Junos OS Evolved: An attacker sending a specific genuine BGP packet causes a
CVE-2026-219167.3 HIGHJunos OS: A low privileged user can escalate their privileges so that they can login as ro
CVE-2026-337916.7 MEDIUMJunos OS and Junos OS Evolved: Execution of crafted CLI commands allows for arbitrary shel
CVE-2026-219156.7 MEDIUMJSI Virtual Lightweight Collector: Shell escape allows privilege escalation to root
CVE-2026-337746.5 MEDIUMJunos OS: MX Series: Firewall filters on lo0.<non-0> in the default routing instance are n
CVE-2026-337836.5 MEDIUMJunos OS Evolved: PTX Series: If SRTE tunnels provisioned via PCEP are present and specifi
CVE-2026-337756.5 MEDIUMJunos OS: MX Series: Mismatch between configured and received packet types causes memory l
CVE-2026-337826.5 MEDIUMJunos OS: MX Series: In specific DHCPv6 scenarios jdhcpd memory increases continuously wit
CVE-2026-337806.5 MEDIUMJunos OS and Junos OS Evolved: In an EVPN-MPLS scenario churn of ESI routes causes a memor
CVE-2026-337816.5 MEDIUMJunos OS: EX Series, QFX Series: In a VXLAN scenario when specific control protocol packet
CVE-2025-599696.5 MEDIUMJunos OS Evolved: QFX5000 Series and PTX Series: An attacker sending crafted multicast pac
CVE-2026-219196.5 MEDIUMJunos OS and Junos OS Evolved: A high frequency of connecting and disconnecting NETCONF se

Showing top 20 of 26 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Junos OS
Same vendor: Juniper Networks
Same weakness: CWE-296

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