Is CVE-2026-33791 being actively exploited?

CVE-2026-33791 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2026-33791?

CVE-2026-33791 has a CVSS 3.1 base score of 6.7 (MEDIUM).

CVE-2026-33791

MEDIUM · CVSS 6.7EPSS 0.7%EU EUVD

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.

Key facts

CVSS score: 6.7 (v3.1)
Severity: MEDIUM
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-78
EPSS score: 0.7% (51th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2026-21207)
Published: April 9, 2026
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2026-21207 in the EU Vulnerability Database. Last updated in EUVD on April 22, 2026.

View on the EU Vulnerability Database

Affected products

juniper / junos
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and 48 more…

Certified products that may be affected

6 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

Juniper SRX Series and vSRX for Junos OS 24.4R1 - Juniper Networks, Inc. - Common Criteria Certificate Number: 2026/163 - active
Junos Space Network Management Platform, with or without Network Director and with or without Security Director in JA2500 - Juniper Networks, Inc. - FIPS 140 3816 - historical
Juniper Networks SRX345/SRX345-DUAL-AC with Junos 15.1X49-D110 - Juniper Networks, Inc. - FIPS 140 3247 - historical
Junos-FIPS 10.4 L2 OS Cryptographic Module - Juniper Networks, Inc. - FIPS 140 1813 - historical
Junos-FIPS 10.4 L1 OS Cryptographic Module - Juniper Networks, Inc. - FIPS 140 1772 - historical

See all 6 in the Security Certifications Explorer.

References

https://kb.juniper.net/JSA107875(Mitigation, Vendor Advisory)
https://supportportal.juniper.net/JSA107875

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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