CVE-2026-33793— Junos OS and Junos OS Evolved: When an unsigned Python op script configuration is present, a local low privileged user can compromise the system
Quick assessment
Affected
Juniper Networks Junos OS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
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
Possible ATT&CK Techniques 1 AI
T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2026-33793
Vulnerability Information
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Vulnerability Title
Junos OS and Junos OS Evolved: When an unsigned Python op script configuration is present, a local low privileged user can compromise the system
Source: CVE Program / CVE List V5
Vulnerability Description
An Execution with Unnecessary Privileges vulnerability in the User Interface (UI) of Juniper Networks Junos OS and Junos OS Evolved allows a local, low-privileged attacker to gain root privileges, thus compromising the system.
When a configuration that allows unsigned Python op scripts is present on the device, a non-root user is able to execute malicious op scripts as a root-equivalent user, leading to privilege escalation.
This issue affects Junos OS:
* All versions before 22.4R3-S7,
* from 23.2 before 23.2R2-S4,
* from 23.4 before 23.4R2-S6,
* from 24.2 before 24.2R1-S2, 24.2R2,
* from 24.4 before 24.4R1-S2, 24.4R2;
Junos OS Evolved:
* All versions before 22.4R3-S7-EVO,
* from 23.2 before 23.2R2-S4-EVO,
* from 23.4 before 23.4R2-S6-EVO,
* from 24.2 before 24.2R2-EVO,
* from 24.4 before 24.4R1-S1-EVO, 24.4R2-EVO.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
带着不必要的权限执行
Source: CVE Program / CVE List V5
Vulnerability Title
Juniper Networks Junos OS和Juniper Networks Junos OS Evolved 安全漏洞
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
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Juniper Networks | Junos OS | 0 ~ 22.4R3-S7 | - |
|
| Juniper Networks | Junos OS Evolved | 0 ~ 22.4R3-S7-EVO | - |
|
II. Public POCs for CVE-2026-33793
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-33793 (2)
Same Patch Batch · Juniper Networks · 2026-04-09 · 26 CVEs total
| CVE-2026-33784 | 9.8 CRITICAL | JSI Virtual Lightweight Collector: Default password is not required to be changed which al |
| CVE-2026-33785 | 8.8 HIGH | Junos OS: MX Series: Missing Authorization for specific 'request' CLI commands in a JDM/CS |
| CVE-2025-13914 | 8.7 HIGH | Apstra: SSH host key validation vulnerability for managed devices |
| CVE-2026-33788 | 7.8 HIGH | Junos OS Evolved: Local, authenticated attacker can gain privileged access to FPCs |
| CVE-2026-33790 | 7.5 HIGH | Junos OS: SRX Series: In a NAT64 configuration, receipt of a specific, malformed ICMPv6 pa |
| CVE-2026-33778 | 7.5 HIGH | Junos OS: SRX Series, MX Series: When a specifically malformed first ISAKMP packet is rece |
| CVE-2026-33797 | 7.4 HIGH | Junos OS and Junos OS Evolved: An attacker sending a specific genuine BGP packet causes a |
| CVE-2026-33771 | 7.4 HIGH | CTP OS: Configuring password requirements does not work which permits the use of weak pass |
| CVE-2026-21916 | 7.3 HIGH | Junos OS: A low privileged user can escalate their privileges so that they can login as ro |
| CVE-2026-21915 | 6.7 MEDIUM | JSI Virtual Lightweight Collector: Shell escape allows privilege escalation to root |
| CVE-2026-33791 | 6.7 MEDIUM | Junos OS and Junos OS Evolved: Execution of crafted CLI commands allows for arbitrary shel |
| CVE-2026-33780 | 6.5 MEDIUM | Junos OS and Junos OS Evolved: In an EVPN-MPLS scenario churn of ESI routes causes a memor |
| CVE-2025-59969 | 6.5 MEDIUM | Junos OS Evolved: QFX5000 Series and PTX Series: An attacker sending crafted multicast pac |
| CVE-2026-21919 | 6.5 MEDIUM | Junos OS and Junos OS Evolved: A high frequency of connecting and disconnecting NETCONF se |
| CVE-2026-33782 | 6.5 MEDIUM | Junos OS: MX Series: In specific DHCPv6 scenarios jdhcpd memory increases continuously wit |
| CVE-2026-33775 | 6.5 MEDIUM | Junos OS: MX Series: Mismatch between configured and received packet types causes memory l |
| CVE-2026-33779 | 6.5 MEDIUM | Junos OS: SRX Series: Insufficient certificate verification for device to SD cloud communi |
| CVE-2026-33783 | 6.5 MEDIUM | Junos OS Evolved: PTX Series: If SRTE tunnels provisioned via PCEP are present and specifi |
| CVE-2026-33781 | 6.5 MEDIUM | Junos OS: EX Series, QFX Series: In a VXLAN scenario when specific control protocol packet |
| CVE-2026-33774 | 6.5 MEDIUM | Junos OS: MX Series: Firewall filters on lo0.<non-0> in the default routing instance are n |
Showing top 20 of 26 CVEs. View all on vendor page → →
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V. Comments for CVE-2026-33793
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