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CVE-2026-103411high7.1

Session Smart Router: A malicious DHCP server causes information disclosure and a service crash during DHCP option parsing

Impact

Juniper Networks Session Smart Router versions less than 7.0.5, 7.1.7, and 7.2.3 have an Integer Underflow vulnerability, allowing an attacker with local network access to cause information disclosure and a denial of service via a malicious DHCP reply. The vulnerability is in DhcpMessageDecoder. An attacker must have local network access to exploit this weakness.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

What to do

The following software releases of Session Smart Router have been updated to resolve these specific issues:

  • 7.0.5

and all subsequent releases;

  • 7.1.7

and all subsequent releases;

  • 7.2.3 and all subsequent releases.
juniper guidance

There are no known workarounds for this issue.

juniper guidance

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

Juniper Networks · juniper

Session Smart Router

3 ranges
juniper version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

0 → before 7.0.5

custom versions

7.1.0 → before 7.1.7

custom versions

7.2.0 → before 7.2.3

custom versions

unaffected

unknown

Other versions: unaffected

Original source 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.

Inside the record

Evidence available

Package identity · not supplied
Version evidence
Remediation guidance
Weakness classification
Additional publishers · not supplied

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-103411

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-191 ↗

CWE-191 Integer Underflow (Wrap or Wraparound)

juniper

Related →
Contributing organizations · 1
juniper

Assigning organization

2026-10-28

What changed

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References

1 sources
supportportal.juniper.net/JSA112183
vendor-advisoryjuniper