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VulnerabilityPublished

CVE-2026-103405: Juniper Networks Session Smart Router · Injection

Affects Juniper Networks Session Smart RouterSource CVE Database V5

0

Not known to be exploited · CVSS 5.8 Medium · fixed in 7.2.3 : update Juniper Networks Session Smart Router when convenient.

Data as of 28 Oct 2026, 17:22 UTC

CVSS 3.1 base score
5.8Medium
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:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

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

Fixed versions 7.0.5, 7.1.7, and 7.2.3 are available and should be applied to remediate this vulnerability. No additional mitigation actions are indicated by the vendor advisory. Users should upgrade to these fixed releases to address the issue.

Description

CVE-2026-103405 is an injection vulnerability in the web server component of Juniper Networks Session Smart Router and Session Smart Conductor. It allows an attacker to inject arbitrary HTTP headers through unsanitized request body parameters. The flaw is classified as CWE-74, indicating improper neutralization of special elements in output used by a downstream component. This vulnerability affects multiple versions prior to fixed releases 7.0.5, 7.1.7, and 7.2.3. The CVSS 3.1 base score is 5.8, reflecting a medium severity with network attack vector, low attack complexity, no privileges or user interaction required, and a scope change. No known exploits are reported in the wild.

References

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