CVE-2021-31349

CRITICAL

Juniper 128 Technology Session Smart Router <4.5.11/5.0-5.0.1 Auth Bypass via HTTP Header

Title source: llm
STIX 2.1

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.

References (1)

Core 1
Core References
Vendor Advisory x_refsource_confirm
https://kb.juniper.net/JSA11256

Scores

CVSS v3 9.8
EPSS 0.0075
EPSS Percentile 73.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-287
Status published
Products (1)
juniper/128_technology_session_smart_router_firmware < 4.5.11
Published Oct 19, 2021
Tracked Since Feb 18, 2026