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CVE-2026-33791— Junos OS and Junos OS Evolved: Execution of crafted CLI commands allows for arbitrary shell injection as root

CVSS 6.7 · Medium EPSS 0.01% · P3
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I. Basic Information for CVE-2026-33791

Vulnerability Information
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Vulnerability Title
Junos OS and Junos OS Evolved: Execution of crafted CLI commands allows for arbitrary shell injection as root
Source: NVD (National Vulnerability Database)
Vulnerability Description
An OS Command Injection vulnerability in the CLI processing of Juniper Networks Junos OS and Junos OS Evolved allows a local, high-privileged attacker executing specific, crafted CLI commands to inject arbitrary shell commands as root, leading to a complete compromise of the system. Certain 'set system' commands, when executed with crafted arguments, are not properly sanitized, allowing for arbitrary shell injection. These shell commands are executed as root, potentially allowing for complete control of the vulnerable system. This issue affects: Junos OS:  * all versions before 22.4R3-S8,  * from 23.2 before 23.2R2-S5,  * from 23.4 before 23.4R2-S7,  * from 24.2 before 24.2R2-S2,  * from 24.4 before 24.4R2,  * from 25.2 before 25.2R2;  Junos OS Evolved:  * all versions before 22.4R3-S8-EVO,  * from 23.2 before 23.2R2-S5-EVO,  * from 23.4 before 23.4R2-S7-EVO,  * from 24.2 before 24.2R2-S2-EVO,  * from 24.4 before 24.4R2-EVO,  * from 25.2 before 25.2R1-S1-EVO, 25.2R2-EVO.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Juniper Networks Junos OS和Juniper Networks Junos OS Evolved 操作系统命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Juniper Networks Junos OS和Juniper Networks Junos OS Evolved都是美国瞻博网络（Juniper Networks）公司的产品。Juniper Networks Junos OS是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 Evolved是Junos OS 的升级版系统。 Juniper Networks Junos OS和Juniper Network
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-S8 -
Juniper NetworksJunos OS Evolved 0 ~ 22.4R3-S8-EVO -

II. Public POCs for CVE-2026-33791

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III. Intelligence Information for CVE-2026-33791

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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-2026-337787.5 HIGHJunos OS: SRX Series, MX Series: When a specifically malformed first ISAKMP packet is rece
CVE-2026-337907.5 HIGHJunos OS: SRX Series: In a NAT64 configuration, receipt of a specific, malformed ICMPv6 pa
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-2026-219156.7 MEDIUMJSI Virtual Lightweight Collector: Shell escape allows privilege escalation to root
CVE-2026-337796.5 MEDIUMJunos OS: SRX Series: Insufficient certificate verification for device to SD cloud communi
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
CVE-2026-337806.5 MEDIUMJunos OS and Junos OS Evolved: In an EVPN-MPLS scenario churn of ESI routes causes a memor
CVE-2026-337826.5 MEDIUMJunos OS: MX Series: In specific DHCPv6 scenarios jdhcpd memory increases continuously wit
CVE-2026-337756.5 MEDIUMJunos OS: MX Series: Mismatch between configured and received packet types causes memory l
CVE-2026-337746.5 MEDIUMJunos OS: MX Series: Firewall filters on lo0.<non-0> in the default routing instance are n
CVE-2026-337816.5 MEDIUMJunos OS: EX Series, QFX Series: In a VXLAN scenario when specific control protocol packet
CVE-2026-337836.5 MEDIUMJunos OS Evolved: PTX Series: If SRTE tunnels provisioned via PCEP are present and specifi

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-78

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