CVE-2026-33793

Junos OS and Junos OS Evolved: When an unsigned Python op script configuration is present, a local low privileged user can compromise the system

HIGH

7.8

CVSS Score

Published: April 9, 2026 at 09:24 PM UTC

Updated: October 26, 2026 at 10:10 PM UTC

3 products affected across 2 vendorsJunosJunos OS EvolvedJunos OS Evolved

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Severity

HIGH7.8

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Junos · Juniper Networks

95%

Affected range stops below 22.4R3-S7, so it looks safe — our inference, not a vendor statement

Affected range stops below 23.2R2-S4, so it looks safe — our inference, not a vendor statement

Affected range stops below 23.4R2-S6, so it looks safe — our inference, not a vendor statement

Affected range stops below 24.2R1-S2, 24.2R2, so it looks safe — our inference, not a vendor statement

Affected range stops below 24.4R1-S2, 24.4R2, so it looks safe — our inference, not a vendor statement

Junos OS Evolved · Juniper Networks

90%

v < 22.4R3-S7-EVO23.2 ≤ v < 23.2R2-S4-EVO23.4 ≤ v < 23.4R2-S6-EVO24.2 ≤ v < 24.2R2-EVO24.4 ≤ v < 24.4R1-S1-EVO, 24.4R2-EVO23.2 23.4 24.2 24.4

Affected range stops below 22.4R3-S7-EVO, so it looks safe — our inference, not a vendor statement

Affected range stops below 23.2R2-S4-EVO, so it looks safe — our inference, not a vendor statement

Affected range stops below 23.4R2-S6-EVO, so it looks safe — our inference, not a vendor statement

Affected range stops below 24.2R2-EVO, so it looks safe — our inference, not a vendor statement

Affected range stops below 24.4R1-S1-EVO, 24.4R2-EVO, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://supportportal.juniper.net/JSA103142

References (2)

Source: cverecord

https://kb.juniper.net/JSA103142

Vendor AdvisoryMitigation

Source: cverecord

https://supportportal.juniper.net/JSA103142

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGHjuniper

Attack Vector: LOCAL
Complexity: LOW
Privileges: LOW
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusANALYZED

CWE

CWE-250

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