CVE-2026-33776

Description

A Missing Authorization vulnerability in the CLI of Juniper Networks Junos OS and Junos OS Evolved allows a local user with low privileges to read sensitive information. A local user with low privileges can execute the CLI command 'show mgd' with specific arguments which will expose sensitive information. This issue affects Junos OS: * all versions before 22.4R3-S8, * 23.2 versions before 23.2R2-S6, * 23.4 versions before 23.4R2-S6, * 24.2 versions before 24.2R2-S4, * 24.4 versions before 24.4R2-S1, * 25.2 version before 25.2R1-S2, 25.2R2; Junos OS Evolved: * all versions before 23.2R2-S6-EVO, * 23.4 version before 23.4R2-S6-EVO, * 24.2 version before 24.2R2-S4-EVO, * 24.4 versions before 24.4R2-S1-EVO, * 25.2 versions before 25.2R2-EVO.

CVSS Details

CVSS Score

5.5

Severity

MEDIUM

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Configurations (Affected Products)

cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:* - VULNERABLE

cpe:2.3:o:juniper:junos:22.4:-:*:*:*:*:*:* - VULNERABLE

cpe:2.3:o:juniper:junos:22.4:r1:*:*:*:*:*:* - VULNERABLE

cpe:2.3:o:juniper:junos:22.4:r1-s1:*:*:*:*:*:* - VULNERABLE

cpe:2.3:o:juniper:junos:22.4:r1-s2:*:*:*:*:*:* - VULNERABLE

cpe:2.3:o:juniper:junos_os_evolved:*:*:*:*:*:*:*:* - VULNERABLE

cpe:2.3:o:juniper:junos_os_evolved:23.2:-:*:*:*:*:*:* - VULNERABLE

cpe:2.3:o:juniper:junos_os_evolved:23.2:r1:*:*:*:*:*:* - VULNERABLE

cpe:2.3:o:juniper:junos_os_evolved:23.2:r1-s1:*:*:*:*:*:* - VULNERABLE

cpe:2.3:o:juniper:junos_os_evolved:23.2:r1-s2:*:*:*:*:*:* - VULNERABLE

Junos OS < 22.4R3-S8

Junos OS 23.2 < 23.2R2-S6

Junos OS 23.4 < 23.4R2-S6

Junos OS 24.2 < 24.2R2-S4

Junos OS 24.4 < 24.4R2-S1

Junos OS 25.2 < 25.2R1-S2, 25.2R2

Junos OS Evolved < 23.2R2-S6-EVO

Junos OS Evolved 23.4 < 23.4R2-S6-EVO

Junos OS Evolved 24.2 < 24.2R2-S4-EVO

Junos OS Evolved 24.4 < 24.4R2-S1-EVO

Junos OS Evolved 25.2 < 25.2R2-EVO

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

# PoC for CVE-2026-33776: Missing Authorization in Junos OS CLI
# This script demonstrates the information disclosure vulnerability.
# Requirement: Local low-privileged shell access on Junos device.

#!/bin/sh

echo "Attempting to exploit CVE-2026-33776..."

# The 'show mgd' command with specific arguments leaks sensitive info.
# The specific arguments are required to trigger the bug.

show mgd <specific_arguments>

# Expected Result: The system returns sensitive information that should
# be restricted to administrative users only, leading to information disclosure.

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-33776
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-33776
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-33776/
[4] VulDB https://vuldb.com/cve/CVE-2026-33776
[5] https://kb.juniper.net/JSA107866

Raw JSON Data

JSON

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