All vulnerabilities
CVE-2026-103409

Session Smart Router: An attacker obtains administrative privileges when an unauthenticated internal endpoint is accessed

Juniper Networks Session Smart RouterNetwork & edge
CVSS
9.8Critical
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)No scoreNo FIRST EPSS score in this snapshot yet
Fixed in7.0.5Also 7.1.7, 7.2.3CVE List
Published28 Oct 2026Updated 28 Oct 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

A Missing authentication for critical function vulnerability in Juniper Networks Session Smart Router allows an unauthenticated network-based attacker to obtain administrative privileges by passing crafted URL parameters to an insecure endpoint running as root.

Note that this vulnerability can only be exploited prior to the device being onboarded to Mist/Conductor. The issue can no longer be exploited once a device is onboarded to Mist/Conductor.

Text from CVE List

Affected versions 3

  • Session Smart Routeraffected: all versions before 7.0.5CVE List
  • Session Smart Routeraffected: 7.1.0 before 7.1.7CVE List
  • Session Smart Routeraffected: 7.2.0 before 7.2.3CVE List

References 1