Session Smart Router: Authentication Bypass Vulnerability
Priority MEDIUM 45CWE-287Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-287.
Summary
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.
Why it matters now
EPSS 0.01721 77th percentileScored 2026-11-07
Fix Fixed 128 Technology Session Smart Router (Juniper Networks): 4.5.11
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Juniper | 128 Technology Session Smart Router | before 4.5.11; 5.0 – 5.0.1 | 4.5.11 | Patch available | CNA |
- 128 Technology Session Smart Router VendorJuniper Affected before 4.5.11; 5.0 – 5.0.1 Fixed in 4.5.11 Patch available CNA
Remediation
- Fix · CNA 128 Technology Session Smart Router (Juniper Networks) Fixed in 4.5.11
Timeline
- 2026-10-02 Threatist record created from CVE-2021-31349
- 2026-10-03 Alias added: GHSA-4r2w-j4p7-rw4p
References
Advisory 1
Sources
- CVE-2021-31349 · CVE Program
- CVE-2021-31349 · NVD
- FIRST EPSS
- GHSA-4r2w-j4p7-rw4p · GitHub Advisory Database · CC BY 4.0
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