High severity · published Oct 28, 2026
CVE-2026-103411
Session Smart Router: A malicious DHCP server causes information disclosure and a service crash during DHCP option parsing
New
7.1
CVSS
–
EPSS
No
On KEV
Description
An Integer Underflow vulnerability in DhcpMessageDecoder in Juniper Networks Session Smart Router allows an attacker with local network access to cause information disclosure and a denial of service via a malicious DHCP reply.
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Attack vector
Adjacent
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SS
Session Smart Router · Juniper Networks
before 7.0.5; 7.1.0 before 7.1.7; 7.2.0 before 7.2.3 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-103411
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-103411
vendor-advisory
https://supportportal.juniper.net/JSA112183
More from Session Smart Router
9.8
CVE-2026-103409
Session Smart Router: An attacker obtains administrative privileges when an unauthenticated internal endpoint is accessed
9.8
CVE-2025-21589
Session Smart Router, Session Smart Conductor, WAN Assurance Router: API Authentication Bypass vulnerability
8.8
CVE-2026-106079
Session Smart Router and Session Smart Conductor: Improper validation of a field causes privilege escalation when updating the YANG configuration
8.8
CVE-2026-103408
Session Smart Router: An attacker-controlled input causes remote code execution when parsing DHCP options
8.8
CVE-2026-103407
Session Smart Router and Session Smart Conductor: Unsanitized input allows arbitrary file read, overwrite, or deletion via the PKI management