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
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.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Junos OS and Junos OS Evolved: When an unsigned Python op script configuration is present, a local low privileged user can compromise the system
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.
- Record
CVE-2026-33793- CVSS 4.0
- 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 - CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-250
- Updated
- 2026-11-02
EUVDEUVD-2026-21095
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.
- Record
EUVD-2026-21095- CVSS 4.0
- 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 - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-fc25-pm3m-2gqh
An Execution with Unnecessary Privileges vulnerability in the User Interface (UI) of Juniper...
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.
- Record
GHSA-fc25-pm3m-2gqh- CVSS 4.0
- 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/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:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-250
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-33793- CVSS 4.0
- 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/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 - CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-250
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-33793 is a high vulnerability (CVSS 8.5) in Juniper Junos, published April 9, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.16%, the 5th percentile. No source names a fixed version.