CVE-2026-33791

April 9, 2026, 10:16 p.m.

8.4
High

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.

Product(s) Impacted

Vendor Product Versions
Juniper
  • Junos Os
  • Junos Os Evolved
  • <22.4R3-S8, 23.2, 23.4, 24.2, 24.4, 25.2
  • <22.4R3-S8-EVO, 23.2, 23.4, 24.2, 24.4, 25.2

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-78
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

*CPE(s)

Affected systems and software identified for this CVE.

Type Vendor Product Version Update Edition Language Software Edition Target Software Target Hardware Other Information
a juniper junos_os <22.4R3-S8 / / / / / / /
a juniper junos_os 23.2 <23.2R2-S5 / / / / / /
a juniper junos_os 23.4 <23.4R2-S7 / / / / / /
a juniper junos_os 24.2 <24.2R2-S2 / / / / / /
a juniper junos_os 24.4 <24.4R2 / / / / / /
a juniper junos_os 25.2 <25.2R2 / / / / / /
a juniper junos_os_evolved <22.4R3-S8-EVO / / / / / / /
a juniper junos_os_evolved 23.2 <23.2R2-S5-EVO / / / / / /
a juniper junos_os_evolved 23.4 <23.4R2-S7-EVO / / / / / /
a juniper junos_os_evolved 24.2 <24.2R2-S2-EVO / / / / / /
a juniper junos_os_evolved 24.4 <24.4R2-EVO / / / / / /
a juniper junos_os_evolved 25.2 <25.2R1-S1-EVO / / / / / /

References

https://kb.juniper.net/JSA107875

Tags

CWE-78
[email protected]
2026-04-09
CVE-2026-33791

CVSS Score

8.4 / 10

CVSS Data - 4.0

  • Attack Vector: LOCAL
  • Attack Complexity: LOW
  • Attack Requirements: NONE
  • Privileges Required: HIGH
  • User Interaction: NONE
  • Scope:
  • Confidentiality Impact: HIGH
  • Integrity Impact: HIGH
  • Availability Impact: HIGH
  • Exploit Maturity: NOT_DEFINED

    • CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:L/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:Y/R:A/V:C/RE:M/U:Amber

    View Vector String

Timeline

Published: April 9, 2026, 10:16 p.m.
Last Modified: April 9, 2026, 10:16 p.m.

Status : Received

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

[email protected]

*Disclaimer: Some vulnerabilities do not have an associated CPE. To enhance the data, we use AI to infer CPEs based on CVE details. This is an automated process and might not always be accurate.