CVE Feed

    Dashboard / CVE / CVE-2026-103409

    CVE-2026-103409

    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.

    Published:Oct 28, 2026
    Last Modified:Oct 28, 2026
    EPS:Oct 28, 2026
    EPSS Score:
    CVSS Score:9.8

    Affected Products

    Vendor
    Juniper
    Product
    Session Smart Router

    Exploits

    https://github.com/Hunt-Benito/the-unguarded-first-day-cve-2026-103409-juniper-session-smart-router

    Related CVEs

    CVE-2026-106079 (CVSS 8.8) — An Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability in…
    CVE-2026-103411 (CVSS 7.1) — An Integer Underflow vulnerability in DhcpMessageDecoder in Juniper Networks Session Smart Router allows an at…
    CVE-2026-103410 (CVSS 7.5) — An Integer Overflow vulnerability in the DPI certificate scanner in Juniper Networks Session Smart Router allo…
    CVE-2026-103408 (CVSS 8.8) — A Stack Buffer Overflow vulnerability in the DHCP client in Juniper Networks Session Smart Router allows an un…
    CVE-2026-103407 (CVSS 8.8) — An Improper Limitation of a Pathname to a Restricted Directory vulnerability in ConfigDirector in Juniper Netw…
    CVE-2026-103405 (CVSS 5.8) — An Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') vulnerab…
    CVE-2026-103403 (CVSS 8.8) — An Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability in…
    CVE-2026-103402 (CVSS 8.8) — An Insufficient Verification of Data Authenticity vulnerability in PCLI in Juniper Networks Session Smart Rout…
    CVE-2026-103401 (CVSS 8.8) — An Improper Link Resolution Before File Access ('Link Following') vulnerability in the unauthenticated web ser…
    CVE-2026-103400 (CVSS 5.5) — An Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') vulnerab…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High