CVE-2026-33793 (GCVE-0-2026-33793)
Vulnerability from cvelistv5 – Published: 2026-04-09 21:24 – Updated: 2026-04-16 15:14
VLAI?
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
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.
Severity ?
CWE
- CWE-250 - Execution with Unnecessary Privileges
Assigner
References
| URL | Tags | ||||
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Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Juniper Networks | Junos OS |
Affected:
0 , < 22.4R3-S7
(semver)
Affected: 23.2 , < 23.2R2-S4 (semver) Affected: 23.4 , < 23.4R2-S6 (semver) Affected: 24.2 , < 24.2R1-S2, 24.2R2 (semver) Affected: 24.4 , < 24.4R1-S2, 24.4R2 (semver) |
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|
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Date Public ?
2026-04-08 16:00
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\"subConfidentialityImpact\": \"NONE\", \"vulnConfidentialityImpact\": \"HIGH\", \"vulnerabilityResponseEffort\": \"NOT_DEFINED\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"vendor\": \"Juniper Networks\", \"product\": \"Junos OS\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"22.4R3-S7\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"23.2\", \"lessThan\": \"23.2R2-S4\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"23.4\", \"lessThan\": \"23.4R2-S6\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"24.2\", \"lessThan\": \"24.2R1-S2, 24.2R2\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"24.4\", \"lessThan\": \"24.4R1-S2, 24.4R2\", \"versionType\": \"semver\"}], \"defaultStatus\": \"unaffected\"}, {\"vendor\": \"Juniper Networks\", \"product\": \"Junos OS Evolved\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"22.4R3-S7-EVO\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"23.2\", \"lessThan\": \"23.2R2-S4-EVO\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"23.4\", \"lessThan\": \"23.4R2-S6-EVO\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"24.2\", \"lessThan\": \"24.2R2-EVO\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"24.4\", \"lessThan\": \"24.4R1-S1-EVO, 24.4R2-EVO\", \"versionType\": \"semver\"}], \"defaultStatus\": \"unaffected\"}], \"exploits\": [{\"lang\": \"en\", \"value\": \"Juniper SIRT is not aware of any malicious exploitation of this vulnerability.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"Juniper SIRT is not aware of any malicious exploitation of this vulnerability.\", \"base64\": false}]}], \"solutions\": [{\"lang\": \"en\", \"value\": \"The following software releases have been updated to resolve this specific issue: \\n\\nJunos OS Evolved: 22.4R3-S7-EVO, 23.2R2-S4-EVO, 23.4R2-S6-EVO, 24.2R2-EVO, 24.4R1-S1-EVO, 24.4R2-EVO, 25.2R1-EVO and all subsequent releases.\\n\\nJunos 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.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"The following software releases have been updated to resolve this specific issue: \u003cbr\u003e\u003cbr\u003eJunos OS Evolved: 22.4R3-S7-EVO, 23.2R2-S4-EVO, 23.4R2-S6-EVO, 24.2R2-EVO, 24.4R1-S1-EVO, 24.4R2-EVO, 25.2R1-EVO and all subsequent 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://kb.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 only affects systems when remote Python3 op scripts are enabled.\\n\\n\\u00a0[ system scripts language python3]\\n\\nStarting in Junos OS Evolved Release 21.2R1, the junos-defaults configuration group includes the language python statement by default.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"This issue only affects systems when remote Python3 op scripts are enabled.\u003cbr\u003e\u003ctt\u003e\u003cbr\u003e\u003c/tt\u003e\u003ctt\u003e\u0026nbsp;[ system scripts language python3]\u003cbr\u003e\u003c/tt\u003e\u003cbr\u003eStarting in Junos OS Evolved Release 21.2R1, the \u003ctt\u003ejunos-defaults\u003c/tt\u003e configuration group includes the language python statement by default.\u003cbr\u003e\u003cbr\u003e\", \"base64\": false}]}], \"providerMetadata\": {\"orgId\": \"8cbe9d5a-a066-4c94-8978-4b15efeae968\", \"shortName\": \"juniper\", \"dateUpdated\": \"2026-04-09T21:24:50.485Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-33793\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-04-14T03:55:39.735Z\", \"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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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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