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CVE-2026-103400VulnerabilityPublished

Improper Neutralization of Special Elements

Source GCVE Database

0
Authoritative record:CVE-2026-103400· Medium 5.5

Not known to be exploited · CVSS 5.5 Medium · fixed in 7.2.3 : update Session Smart Router when convenient.

Data as of 28 Oct 2026, 20:12 UTC

CVSS 3.1 base score
5.5Medium
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 7.2.3, 7.1.7, 7.0.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 28 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade Session Smart to 7.2.3, 7.1.7 or 7.0.5.

Affected software

ProductAffectedFixed in
Juniper NetworksSession Smart RouterAffected
  • >=7.2.0 <7.2.3
Fixed in
  • 7.2.3
Juniper NetworksSession Smart RouterAffected
  • >=7.1.0 <7.1.7
Fixed in
  • 7.1.7
Juniper NetworksSession Smart RouterAffected
  • <7.0.5
Fixed in
  • 7.0.5
Juniper NetworksSession Smart ConductorAffected
  • >=7.2.0 <7.2.3
Fixed in
  • 7.2.3
Juniper NetworksSession Smart ConductorAffected
  • >=7.1.0 <7.1.7
Fixed in
  • 7.1.7
Juniper NetworksSession Smart ConductorAffected
  • <7.0.5
Fixed in
  • 7.0.5

AI-suggested

If you cannot patch yet, restrict local access to trusted users only and monitor for unusual filesystem or service behavior.

Description

CVE-2026-103400 is an injection vulnerability in the ember service of Juniper Networks Session Smart Router and Session Smart Conductor. It allows a local attacker to create specially named directories that can lead to unmounting arbitrary filesystems or cause a denial of service after a service restart. The vulnerability requires local access and does not impact confidentiality or integrity but affects availability.

References

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