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CVE-2021-31349 Details

Description

The usage of an internal HTTP header created an authentication bypass vulnerability (CWE-287), allowing an attacker to view internal files, change settings, manipulate services and execute arbitrary code. This issue affects all Juniper Networks 128 Technology Session Smart Router versions prior to 4.5.11, and all versions of 5.0 up to and including 5.0.1.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:9.8 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CNA: [email protected]CVSS-B:9.8 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://kb.juniper.net/JSA11256	CVE	Vendor Advisory
https://kb.juniper.net/JSA11256	[email protected]	Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
NVD-CWE-noinfo	Insufficient Information to Classify Weakness	[email protected]
CWE-287	Improper Authentication	[email protected]

Affected Products

Product	Versions
juniper 128 technology session smart router firmware	< 4.5.11 >= 5.0.0, <= 5.0.1
CPE cpe:2.3:o:juniper:128_technology_session_smart_router_firmware:::::::: Remediation No remediation found in references.
juniper 128 technology session smart router	All versions
CPE cpe:2.3:h:juniper:128_technology_session_smart_router:-:::::::* Remediation No remediation found in references.

Change History

5 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Oct 25, 2022	Reanalysis	[email protected]
Oct 26, 2021	Initial Analysis	[email protected]