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CVE-2026-103393medium4.3

Session Smart Router: An attacker can cause an out-of-bounds read during VRRP packet processing

Impact

An out-of-bounds read vulnerability in Juniper Networks Session Smart Router's VRRP implementation allows an L2-adjacent attacker to read stale memory contents or cause a system fault via a specially crafted VRRPv3 advertisement, affecting versions less than 7.0.5, 7.1.7, and 7.2.3. The attacker must be L2-adjacent to exploit the vulnerability. The impact is reading stale memory contents or causing a system fault.

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 Out-of-Bounds Read vulnerability in the VRRP implementation in Juniper Networks Session Smart Router allows an L2-adjacent attacker to read stale memory contents or cause a system fault via a specially crafted VRRPv3 advertisement.

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-2026-103393

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-125 ↗

CWE-125 Out-of-bounds Read

juniper

Related →
Contributing organizations · 1
juniper

Assigning organization

2026-10-28

What changed

Follow changes
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Large field values are marked as truncated previews. Original source snapshots remain retained.

References

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