FKIE_CVE-2026-33793

Vulnerability from fkie_nvd - Published: 2026-04-09 22:16 - Updated: 2026-04-16 18:42
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 junos *
juniper junos 22.4
juniper junos 22.4
juniper junos 22.4
juniper junos 22.4
juniper junos 22.4
juniper junos 22.4
juniper junos 22.4
juniper junos 22.4
juniper junos 22.4
juniper junos 22.4
juniper junos 22.4
juniper junos 22.4
juniper junos 22.4
juniper junos 22.4
juniper junos 23.2
juniper junos 23.2
juniper junos 23.2
juniper junos 23.2
juniper junos 23.2
juniper junos 23.2
juniper junos 23.2
juniper junos 23.2
juniper junos 23.4
juniper junos 23.4
juniper junos 23.4
juniper junos 23.4
juniper junos 23.4
juniper junos 23.4
juniper junos 23.4
juniper junos 23.4
juniper junos 23.4
juniper junos 23.4
juniper junos 24.2
juniper junos 24.2
juniper junos 24.2
juniper junos 24.2
juniper junos 24.4
juniper junos 24.4
juniper junos 24.4
juniper junos_os_evolved *
juniper junos_os_evolved 22.4
juniper junos_os_evolved 22.4
juniper junos_os_evolved 22.4
juniper junos_os_evolved 22.4
juniper junos_os_evolved 22.4
juniper junos_os_evolved 22.4
juniper junos_os_evolved 22.4
juniper junos_os_evolved 22.4
juniper junos_os_evolved 22.4
juniper junos_os_evolved 22.4
juniper junos_os_evolved 22.4
juniper junos_os_evolved 22.4
juniper junos_os_evolved 22.4
juniper junos_os_evolved 22.4
juniper junos_os_evolved 23.2
juniper junos_os_evolved 23.2
juniper junos_os_evolved 23.2
juniper junos_os_evolved 23.2
juniper junos_os_evolved 23.2
juniper junos_os_evolved 23.2
juniper junos_os_evolved 23.2
juniper junos_os_evolved 23.2
juniper junos_os_evolved 23.4
juniper junos_os_evolved 23.4
juniper junos_os_evolved 23.4
juniper junos_os_evolved 23.4
juniper junos_os_evolved 23.4
juniper junos_os_evolved 23.4
juniper junos_os_evolved 23.4
juniper junos_os_evolved 23.4
juniper junos_os_evolved 23.4
juniper junos_os_evolved 23.4
juniper junos_os_evolved 24.2
juniper junos_os_evolved 24.2
juniper junos_os_evolved 24.2
juniper junos_os_evolved 24.4
juniper junos_os_evolved 24.4
juniper junos_os_evolved 24.4

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              "matchCriteriaId": "E779C0D4-A8F7-4976-B3C8-B9802B96E715",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:juniper:junos_os_evolved:23.4:r2-s5:*:*:*:*:*:*",
              "matchCriteriaId": "C7457415-D893-474B-ABA6-9841BB5CC6DB",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:juniper:junos_os_evolved:24.2:-:*:*:*:*:*:*",
              "matchCriteriaId": "0DD89AAD-C615-42AF-B8AF-E6067862F0F5",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:juniper:junos_os_evolved:24.2:r1:*:*:*:*:*:*",
              "matchCriteriaId": "28AFF11D-E418-4A76-B557-F60622602537",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:juniper:junos_os_evolved:24.2:r1-s2:*:*:*:*:*:*",
              "matchCriteriaId": "0A86A69D-2B90-4B3B-A6EC-88358284787D",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:juniper:junos_os_evolved:24.4:-:*:*:*:*:*:*",
              "matchCriteriaId": "B32ADA05-5F5D-45B6-BB7B-3FA6A6F229F5",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:juniper:junos_os_evolved:24.4:r1:*:*:*:*:*:*",
              "matchCriteriaId": "D6526E82-A6A6-4A65-9B01-B3FCB947F44E",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:juniper:junos_os_evolved:24.4:r2:*:*:*:*:*:*",
              "matchCriteriaId": "25DA0DD2-E974-448C-BD05-ED6FCA4725FB",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "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."
    }
  ],
  "id": "CVE-2026-33793",
  "lastModified": "2026-04-16T18:42:26.533",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "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"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "sirt@juniper.net",
        "type": "Secondary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "YES",
          "Recovery": "USER",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "LOCAL",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 8.5,
          "baseSeverity": "HIGH",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "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/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:U/V:C/RE:M/U:Amber",
          "version": "4.0",
          "vulnAvailabilityImpact": "HIGH",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "MODERATE"
        },
        "source": "sirt@juniper.net",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-04-09T22:16:29.297",
  "references": [
    {
      "source": "sirt@juniper.net",
      "tags": [
        "Mitigation",
        "Vendor Advisory"
      ],
      "url": "https://supportportal.juniper.net/JSA103142"
    }
  ],
  "sourceIdentifier": "sirt@juniper.net",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-250"
        }
      ],
      "source": "sirt@juniper.net",
      "type": "Secondary"
    }
  ]
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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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Detection rules are retrieved from Rulezet.

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