CVE-2026-103411: Juniper Networks Session Smart Router (High, CVSS 7.1)
CVE-2026-103411HighJuniper Networks Session Smart Router
- CVSS
- 7.1 High (v3.1)
- EPSS
- 0.2% chance of exploitation in the next 30 days (higher than 6.9% of CVEs)
- Exploited in the wild
- Not on CISA’s KEV list
- Public exploit
- None reported in public exploit databases
- Weakness
- CWE-191
- Vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H- Published
- Oct 28, 2026
What it is
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.
Description from the National Vulnerability Database.
What to do
Check whether you run Juniper Networks Session Smart Router, then apply the vendor’s fix or mitigation from the advisories below.
Sources: NVD, FIRST EPSS, CISA KEV, and public exploit databases (availability only). ThreatRoundup reports whether public exploit code exists but never links to it: fake proof-of-concepts that infect security researchers are common. This page updates automatically.