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CVE-2026-33802

Junos OS: EX Series: Unauthorized users can execute service-impacting CLI command

Description

A Missing Authorization vulnerability in the CLI of Juniper Networks Junos OS on EX Series allows a local, authenticated attacker to cause a Denial-of-Service (DoS). On EX2300, EX4000, EX4100, EX4300-MP (Multigigabit) and EX4400 switches, an authenticated, local attacker with no specific permissions or class can execute a specific, privileged CLI 'request' command which will cause complete traffic impact until the system automatically recovers. This issue affects Junos OS on EX2300, EX4000, EX4100, EX4300-MP (Multigigabit) and EX4400: * 23.2R2 versions before 23.2R2-S6, * 23.4 versions before 23.4R2-S8, * 24.2 versions before 24.2R2-S4, * 24.4 versions before 24.4R2-S3, * 25.2 versions before 25.2R2, * 25.4 versions before 25.4R1-S1.

Timeline

  1. ID reserved

    By juniper

  2. · 4 months later

    Published

  3. · 1 day later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2026-33802, by who scored it
Scored byCVSSScoreVector
juniperCNA (assigner)4.0Medium6.8CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/RE:M
juniperCNA (assigner)3.1Medium5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVDNVD · Analyzed4.0Medium6.8CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/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:A/V:X/RE:M/U:X
EPSS (exploitation in 30 days)
0.12% · top 98% of all CVEs (12 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.8.

Affected products

  • Juniper Networks · Junos OS

    • affected 23.2R2 – < 23.2R2-S6
    • affected 23.4 – < 23.4R2-S8
    • affected 24.2 – < 24.2R2-S4
    • affected 24.4 – < 24.4R2-S3
    • affected 25.2 – < 25.2R2
    • affected 25.4 – < 25.4R1-S1

What to do

Solution: The following software releases have been updated to resolve this specific issue: Junos OS: 23.2R2-S6, 23.4R2-S8, 24.2R2-S4, 24.4R2-S3, 25.2R2, 25.4R1-S1, 25.4R2, 26.2R1, and all subsequent releases.

Workaround: There are no known workarounds for this issue. To reduce the risk of exploitation use command authorization to limit access to 'request' commands.

Exploitation: Juniper SIRT is not aware of any malicious exploitation of this vulnerability.

References

References1

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .