CVE-2026-33793: An Execution with Unnecessary Privileges vulnerability in the User Interface (UI) of Juniper Networks Junos OS

Q: How do I fix CVE-2026-33793?

junos: upgrade to 22.4; junos os evolved: upgrade to 22.4. Exact commands for each OS are on this page.

Q: Is CVE-2026-33793 being exploited?

CVE-2026-33793 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-33793 affect?

CVE-2026-33793 affects junos, junos os evolved. Severity is high (CVSS 7.8). 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 confi

Routine

HIGH 7.8UPGRADEUPGRADE

CVE-2026-33793 is a high-severity flaw (CVSS 7.8) affecting junos, junos os evolved. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 95%)
CISA exploited list	No
Weakness	CWE-250
Published	2026-04-09
Last modified	2026-10-26

Publisher (CNA): Juniper Networks, Inc. · Vendor: juniper

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-09 22:16 UTCPublished CVE record published
2026-10-26 22:10 UTCUpdated Record last modified

juniper junos UPGRADE

Affected: < 22.4 · 22.4 · 22.4 r1 · 22.4 r1-s1 · 22.4 r1-s2 · 22.4 r2 · 22.4 r2-s1 · 22.4 r2-s2

Fixed in: 22.4

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

juniper junos os evolved UPGRADE

Affected: < 22.4 · 22.4 · 22.4 r1 · 22.4 r1-s1 · 22.4 r1-s2 · 22.4 r2 · 22.4 r2-s1 · 22.4 r2-s2

Fixed in: 22.4

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-33793?

junos: upgrade to 22.4; junos os evolved: upgrade to 22.4. Exact commands for each OS are on this page.

Is CVE-2026-33793 being exploited?

CVE-2026-33793 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-33793 affect?

CVE-2026-33793 affects junos, junos os evolved. Severity is high (CVSS 7.8). 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 confi

How urgent is CVE-2026-33793?

Priority 29/100. High severity

Software pages

Python vulnerabilities · Juniper Junos vulnerabilities

Related CVEs

CVE-2026-33790 HIGH 7.5 UPGRADE An Improper Check for Unusual or Exceptional Conditions vulnerability in the flow daemon (flowd) of Juniper Ne
CVE-2026-33791 MEDIUM 6.7 UPGRADE UPGRADE An OS Command Injection vulnerability in the CLI processing of Juniper Networks Junos OS and Junos OS Evolved
CVE-2026-33785 HIGH 8.8 MITIGATE A Missing Authorization vulnerability in the CLI of Juniper Networks Junos OS on MX Series allows a local, aut
CVE-2026-33773 MEDIUM 5.8 MITIGATE An Incorrect Initialization of Resource vulnerability in the packet forwarding engine (pfe) of Juniper Network
CVE-2026-33779 MEDIUM 6.5 UPGRADE An Improper Following of a Certificate's Chain of Trust vulnerability in J-Web of Juniper Networks Junos OS on

References

← Back to latest CVEs