{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-33793", "assignerOrgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968", "state": "PUBLISHED", "assignerShortName": "juniper", "dateReserved": "2026-03-23T19:46:13.672Z", "datePublished": "2026-04-09T21:24:50.485Z", "dateUpdated": "2026-04-16T15:14:18.212Z" }, "containers": { "cna": { "affected": [ { "defaultStatus": "unaffected", "product": "Junos OS", "vendor": "Juniper Networks", "versions": [ { "lessThan": "22.4R3-S7", "status": "affected", "version": "0", "versionType": "semver" }, { "lessThan": "23.2R2-S4", "status": "affected", "version": "23.2", "versionType": "semver" }, { "lessThan": "23.4R2-S6", "status": "affected", "version": "23.4", "versionType": "semver" }, { "lessThan": "24.2R1-S2, 24.2R2", "status": "affected", "version": "24.2", "versionType": "semver" }, { "lessThan": "24.4R1-S2, 24.4R2", "status": "affected", "version": "24.4", "versionType": "semver" } ] }, { "defaultStatus": "unaffected", "product": "Junos OS Evolved", "vendor": "Juniper Networks", "versions": [ { "lessThan": "22.4R3-S7-EVO", "status": "affected", "version": "0", "versionType": "semver" }, { "lessThan": "23.2R2-S4-EVO", "status": "affected", "version": "23.2", "versionType": "semver" }, { "lessThan": "23.4R2-S6-EVO", "status": "affected", "version": "23.4", "versionType": "semver" }, { "lessThan": "24.2R2-EVO", "status": "affected", "version": "24.2", "versionType": "semver" }, { "lessThan": "24.4R1-S1-EVO, 24.4R2-EVO", "status": "affected", "version": "24.4", "versionType": "semver" } ] } ], "configurations": [ { "lang": "en", "supportingMedia": [ { "base64": false, "type": "text/html", "value": "This issue can affect all systems with Python 3 op scripts enabled:

[ system scripts language python3 ]

However, 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[ system scripts op allow-url-for-python ]\n\n

Starting in Junos OS Evolved Release 21.2R1, the junos-defaults configuration group includes 'system scripts language python3' enabled by default.

\n\n
" } ], "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 'system scripts language python3' enabled by default." } ], "datePublic": "2026-04-08T16:00:00.000Z", "descriptions": [ { "lang": "en", "supportingMedia": [ { "base64": false, "type": "text/html", "value": "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: 

Junos OS Evolved: 

" } ], "value": "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.\n\nWhen 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. \n\nThis issue affects Junos OS: \n\n * All versions before 22.4R3-S7, \n * from 23.2 before 23.2R2-S4, \n * from 23.4 before 23.4R2-S6,\n * from 24.2 before 24.2R1-S2, 24.2R2, \n * from 24.4 before 24.4R1-S2, 24.4R2; \n\n\n\n\nJunos OS Evolved: \n\n\n\n * All versions before 22.4R3-S7-EVO, \n * from 23.2 before 23.2R2-S4-EVO, \n * from 23.4 before 23.4R2-S6-EVO,\n * from 24.2 before 24.2R2-EVO, \n * from 24.4 before 24.4R1-S1-EVO, 24.4R2-EVO." } ], "exploits": [ { "lang": "en", "supportingMedia": [ { "base64": false, "type": "text/html", "value": "Juniper SIRT is not aware of any malicious exploitation of this vulnerability." } ], "value": "Juniper SIRT is not aware of any malicious exploitation of this vulnerability." } ], "metrics": [ { "cvssV3_1": { "attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1" }, "format": "CVSS", "scenarios": [ { "lang": "en", "value": "GENERAL" } ] }, { "cvssV4_0": { "Automatable": "YES", "Recovery": "USER", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "LOCAL", "baseScore": 8.5, "baseSeverity": "HIGH", "privilegesRequired": "LOW", "providerUrgency": "AMBER", "subAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "CONCENTRATED", "vectorString": "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", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "MODERATE" }, "format": "CVSS", "scenarios": [ { "lang": "en", "value": "GENERAL" } ] } ], "problemTypes": [ { "descriptions": [ { "cweId": "CWE-250", "description": "CWE-250: Execution with Unnecessary Privileges", "lang": "en", "type": "CWE" } ] } ], "providerMetadata": { "orgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968", "shortName": "juniper", "dateUpdated": "2026-04-16T15:14:18.212Z" }, "references": [ { "tags": [ "vendor-advisory" ], "url": "https://supportportal.juniper.net/JSA103142" } ], "solutions": [ { "lang": "en", "supportingMedia": [ { "base64": false, "type": "text/html", "value": "The following software releases have been updated to resolve this specific issue:

Junos 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.

Junos 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.


" } ], "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." } ], "source": { "advisory": "JSA103142", "defect": [ "1842247" ], "discovery": "INTERNAL" }, "timeline": [ { "lang": "en", "time": "2026-04-08T16:00:00.000Z", "value": "Initial Publication" }, { "lang": "en", "time": "2026-04-16T16:00:00.000Z", "value": "While 'language python3' allows an attacker to execute local Python scripts, the scenario with the highest risk of malicious exploitation occurs when an attacker can execute remote Python scripts" } ], "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", "workarounds": [ { "lang": "en", "supportingMedia": [ { "base64": false, "type": "text/html", "value": "Use access lists or firewall filters to limit access to the CLI only from trusted hosts and administrators.
" } ], "value": "Use access lists or firewall filters to limit access to the CLI only from trusted hosts and administrators." } ], "x_generator": { "engine": "Vulnogram 0.1.0-dev" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-04-13T00:00:00+00:00", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "role": "CISA Coordinator", "version": "2.0.3", "id": "CVE-2026-33793" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-14T03:55:39.735Z" } } ] } }