CVE-2026-103401 Juniper Networks Session Smart Router & Conductor - Improper Link Resolution Before File Access

Juniper Networks Session Smart Router and Session Smart Conductor contain an improper link resolution before file access vulnerability in unauthenticated web server handlers, letting local unprivileged users overwrite arbitrary files as root via unauthenticated API endpoints, exploit requires local access on affected routers.

CVSS base score 8.8 /10
High
CISA KEV
Not listed
Public exploit
None known
View the NVD record ↗

Details

Type
Improper Link Resolution Before File Access
Impact
File System Write, Privilege Escalation
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
28 October 2026
Updated
29 October 2026
Weakness
CWE-59

Vendor fix

Update to the latest version that patches this vulnerability.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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