CVE-2026-103408: high-severity vulnerability in Juniper Networks Session Smart Router
Session Smart Router: An attacker-controlled input causes remote code execution when parsing DHCP options
Published
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.8epss 0.3%
A Stack Buffer Overflow vulnerability in the DHCP client in Juniper Networks Session Smart Router allows an unauthenticated attacker on the local network to achieve remote code execution via a malicious DHCP reply.
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
Juniper Networks · Session Smart RouterRelated CVEs — Juniper Networks Session Smart Router
In the same product, most dangerous first.
CVE-2025-21589CRITICALSession Smart Router, Session Smart Conductor, WAN Assurance Router: API Authentication Bypass vulnerabilityEPSS 1.5%CVE-2026-106079HIGHSession Smart Router and Session Smart Conductor: Improper validation of a field causes privilege escalation when updating the YANG configurationEPSS 1.2%CVE-2026-103403HIGHSession Smart Router and Session Smart Conductor: Unvalidated input causes arbitrary file deletion and command execution when deleting audit rulesEPSS 1.2%CVE-2024-2973CRITICALSession Smart Router(SSR): On redundant router deployments API authentication can be bypassedEPSS 1.1%CVE-2026-103390MEDIUMSession Smart Router and Session Smart Conductor: A malformed HTTP URI causes a service crash during HTTP application identificationEPSS 0.4%CVE-2026-103409CRITICALSession Smart Router: An attacker obtains administrative privileges when an unauthenticated internal endpoint is accessedEPSS 0.3%