CVE-2026-33793 (GCVE-0-2026-33793)
Vulnerability from cvelistv5
Published
2026-04-09 21:24
Modified
2026-04-16 15:14
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.5 (High) - CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:L/AU:Y/R:U/V:C/RE:M/U:Amber
CWE
  • CWE-250 - Execution with Unnecessary Privileges
Summary
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.
References
Impacted products
Vendor Product Version
Juniper Networks Junos OS Version: 0   ≤
Version: 23.2   ≤
Version: 23.4   ≤
Version: 24.2   ≤
Version: 24.4   ≤
Create a notification for this product.
   Juniper Networks Junos OS Evolved Version: 0   ≤
Version: 23.2   ≤
Version: 23.4   ≤
Version: 24.2   ≤
Version: 24.4   ≤
Create a notification for this product.
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releases.\u003cbr\u003e\u003cbr\u003eJunos OS: 22.4R3-S7, 23.2R2-S4, 23.4R2-S6, 24.2R1-S2, 24.2R2, 24.4R1-S2, 24.4R2, 25.2R1 and all subsequent releases.\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\", \"base64\": false}]}], \"datePublic\": \"2026-04-08T16:00:00.000Z\", \"references\": [{\"url\": \"https://supportportal.juniper.net/JSA103142\", \"tags\": [\"vendor-advisory\"]}], \"workarounds\": [{\"lang\": \"en\", \"value\": \"Use access lists or firewall filters to limit access to the CLI only from trusted hosts and administrators.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"Use access lists or firewall filters to limit access to the CLI only from trusted hosts and administrators.\u003cbr\u003e\", \"base64\": false}]}], \"x_generator\": {\"engine\": \"Vulnogram 0.1.0-dev\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"An Execution with Unnecessary Privileges vulnerability\\u00a0in 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.\\n\\nWhen a\\u00a0configuration 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.\\u00a0\\n\\nThis issue affects Junos OS:\\u00a0\\n\\n  *  All versions before 22.4R3-S7,\\u00a0\\n  *  from 23.2 before 23.2R2-S4,\\u00a0\\n  *  from 23.4 before\\u00a023.4R2-S6,\\n  *  from 24.2 before 24.2R1-S2, 24.2R2,\\u00a0\\n  *  from 24.4 before 24.4R1-S2, 24.4R2;\\u00a0\\n\\n\\n\\n\\nJunos OS Evolved:\\u00a0\\n\\n\\n\\n  *  All versions before 22.4R3-S7-EVO,\\u00a0\\n  *  from 23.2 before 23.2R2-S4-EVO,\\u00a0\\n  *  from 23.4 before\\u00a023.4R2-S6-EVO,\\n  *  from 24.2 before 24.2R2-EVO,\\u00a0\\n  *  from 24.4 before 24.4R1-S1-EVO, 24.4R2-EVO.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"An Execution with Unnecessary Privileges vulnerability\u0026nbsp;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.\u003cbr\u003e\u003cbr\u003eWhen a\u0026nbsp;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.\u0026nbsp;\u003cbr\u003e\u003cbr\u003eThis issue affects Junos OS:\u0026nbsp;\u003cp\u003e\u003c/p\u003e\u003cul\u003e\u003cli\u003eAll versions before 22.4R3-S7,\u0026nbsp;\u003c/li\u003e\u003cli\u003efrom 23.2 before 23.2R2-S4,\u0026nbsp;\u003c/li\u003e\u003cli\u003efrom 23.4 before\u0026nbsp;23.4R2-S6,\u003c/li\u003e\u003cli\u003efrom 24.2 before 24.2R1-S2, 24.2R2,\u0026nbsp;\u003c/li\u003e\u003cli\u003efrom 24.4 before 24.4R1-S2, 24.4R2;\u0026nbsp;\u003c/li\u003e\u003c/ul\u003e\u003cp\u003e\u003c/p\u003e\u003cp\u003eJunos OS Evolved:\u0026nbsp;\u003c/p\u003e\u003cp\u003e\u003c/p\u003e\u003cul\u003e\u003cli\u003eAll versions before 22.4R3-S7-EVO,\u0026nbsp;\u003c/li\u003e\u003cli\u003efrom 23.2 before 23.2R2-S4-EVO,\u0026nbsp;\u003c/li\u003e\u003cli\u003efrom 23.4 before\u0026nbsp;23.4R2-S6-EVO,\u003c/li\u003e\u003cli\u003efrom 24.2 before 24.2R2-EVO,\u0026nbsp;\u003c/li\u003e\u003cli\u003efrom 24.4 before 24.4R1-S1-EVO, 24.4R2-EVO.\u003c/li\u003e\u003c/ul\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-250\", \"description\": \"CWE-250: Execution with Unnecessary Privileges\"}]}], \"configurations\": [{\"lang\": \"en\", \"value\": \"This issue can affect all systems with Python 3 op scripts enabled:\\n\\n[ system scripts language python3 ]\\n\\nHowever, the risk of malicious exploitation is significantly higher when the ability to execute Python 3 op scripts from a remote location is enabled:\\n\\n\\n\\n[ system scripts op allow-url-for-python ]\\n\\n\\n\\nStarting in Junos OS Evolved Release 21.2R1, the junos-defaults configuration group includes \u0027system scripts language python3\u0027 enabled by default.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"This issue can affect all systems with Python 3 op scripts enabled:\u003cbr\u003e\u003cbr\u003e\u003ctt\u003e[ system scripts language python3 ]\u003c/tt\u003e\u003cbr\u003e\u003cbr\u003eHowever, the risk of malicious exploitation is significantly higher when the ability to execute Python 3 op scripts from a remote location is enabled:\u003cbr\u003e\u003cbr\u003e\\n\\n\u003ctt\u003e[ system scripts op allow-url-for-python ]\u003c/tt\u003e\\n\\n\u003cbr\u003e\u003cbr\u003eStarting in Junos OS Evolved Release 21.2R1, the \u003ctt\u003ejunos-defaults\u003c/tt\u003e configuration group includes \u0027\u003ctt\u003esystem scripts language python3\u003c/tt\u003e\u0027 enabled by default.\u003cbr\u003e\u003cbr\u003e\\n\\n\u003cbr\u003e\", \"base64\": false}]}], \"providerMetadata\": {\"orgId\": \"8cbe9d5a-a066-4c94-8978-4b15efeae968\", \"shortName\": \"juniper\", \"dateUpdated\": \"2026-04-16T15:14:18.212Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-33793\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-04-16T15:14:18.212Z\", \"dateReserved\": \"2026-03-23T19:46:13.672Z\", \"assignerOrgId\": \"8cbe9d5a-a066-4c94-8978-4b15efeae968\", \"datePublished\": \"2026-04-09T21:24:50.485Z\", \"assignerShortName\": \"juniper\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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