CVE-2026-33791

MEDIUMNVD 6.76.7—
EchelonGraph scoreMEDIUM confidence

Score 6.7 from GitHub Security Advisory (severity: HIGH) published 2026-04-10. NVD baseline CVSS 6.7; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
6.7
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 1%CVSS: 6.7Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

An OS Command Injection vulnerability in the CLI processing of Juniper Networks Junos OS and Junos OS Evolved allows a local, high-privileged attacker executing specific, crafted CLI commands to inject arbitrary shell commands as root, leading to a complete compromise of the system.

Certain 'set system' commands, when executed with crafted arguments, are not properly sanitized, allowing for arbitrary shell injection. These shell commands are executed as root, potentially allowing for complete control of the vulnerable system. This issue affects:

Junos OS: 

* all versions before 22.4R3-S8,  * from 23.2 before 23.2R2-S5,  * from 23.4 before 23.4R2-S7,  * from 24.2 before 24.2R2-S2,  * from 24.4 before 24.4R2,  * from 25.2 before 25.2R2; 

Junos OS Evolved: 

* all versions before 22.4R3-S8-EVO,  * from 23.2 before 23.2R2-S5-EVO,  * from 23.4 before 23.4R2-S7-EVO,  * from 24.2 before 24.2R2-S2-EVO,  * from 24.4 before 24.4R2-EVO,  * from 25.2 before 25.2R1-S1-EVO, 25.2R2-EVO.

CVSS v3
6.7
EG Score
6.7(medium)
EPSS
48.7%
KEV
Not listed

Published

April 9, 2026

Last Modified

April 22, 2026

Advisory Details (2)

Auto-updated Jun 15, 2026
No patch confirmed yet.
generic

CEC Juniper Community

https://supportportal.juniper.net/JSA107875
generic

CEC Juniper Community

https://kb.juniper.net/JSA107875

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 9× in last 7d / 42× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-15 16:57 UTCEPSS rescore
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  20. 2026-06-15 04:50 UTCGHSA enrichment
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  25. 2026-06-11 20:23 UTCGHSA enrichment
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  30. 2026-06-10 12:44 UTCGHSA enrichment
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  32. 2026-06-09 12:56 UTCGHSA enrichment
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  36. 2026-06-08 08:13 UTCGHSA enrichment
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  40. 2026-06-07 08:26 UTCEG score recompute
  41. 2026-06-07 08:26 UTCGHSA enrichment
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  74. 2026-05-20 11:22 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2026-33791?
CVE-2026-33791 is a medium vulnerability published on April 9, 2026. An OS Command Injection vulnerability in the CLI processing of Juniper Networks Junos OS and Junos OS Evolved allows a local, high-privileged attacker executing specific, crafted CLI commands to inject arbitrary shell commands as root, leading to a complete compromise of the system. Certain 'set…
When was CVE-2026-33791 disclosed?
CVE-2026-33791 was first published in the National Vulnerability Database on April 9, 2026, with the most recent update on April 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-33791 actively exploited?
CVE-2026-33791 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 48.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-33791?
CVE-2026-33791 has a CVSS v3 base score of 6.7 (NVD).
How do I remediate CVE-2026-33791?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-33791, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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