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TI-2026-82032 Aliases CVE-2026-103401GHSA-mw3r-9657-3g58

Link following in Juniper Session Smart Router allows file overwrite

Priority MEDIUM 40CWE-59Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

Juniper Networks Session Smart Router and Session Smart Conductor are affected before 7.0.5, from 7.1.0 before 7.1.7, and from 7.2.0 before 7.2.3. Improper link resolution (CWE-59) in unauthenticated web server handlers lets a local unprivileged user overwrite arbitrary files as root via unauthenticated API endpoints. Mist-managed routers and unmanaged routers not yet onboarded to a Conductor can be exploited, but routers already managed by a Conductor are not affected.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

Description from the CNA

An Improper Link Resolution Before File Access ('Link Following') vulnerability in the unauthenticated web server handlers in Juniper Networks Session Smart Router and Session Smart Conductor allows a local unprivileged user to overwrite arbitrary files as root via unauthenticated API endpoints. This vulnerability can be exploited on Mist-managed routers and on unmanaged Routers that have not yet been onboarded to a Conductor. Routers already managed by Conductor are not affected.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00344 28th percentileScored 2026-11-07
Fix Fixed Session Smart Router (Juniper Networks): 7.0.5, 7.1.7, 7.2.3Session Smart Conductor (Juniper Networks): 7.0.5, 7.1.7, 7.2.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
JuniperSession Smart Routerbefore 7.0.5; 7.1.0 to before 7.1.7; 7.2.0 to before 7.2.37.0.5, 7.1.7, 7.2.3Patch availableCNA
JuniperSession Smart Conductorbefore 7.0.5; 7.1.0 to before 7.1.7; 7.2.0 to before 7.2.37.0.5, 7.1.7, 7.2.3Patch availableCNA
  • Session Smart Router VendorJuniper Affected before 7.0.5; 7.1.0 to before 7.1.7; 7.2.0 to before 7.2.3 Fixed in 7.0.5, 7.1.7, 7.2.3 Patch available CNA
  • Session Smart Conductor VendorJuniper Affected before 7.0.5; 7.1.0 to before 7.1.7; 7.2.0 to before 7.2.3 Fixed in 7.0.5, 7.1.7, 7.2.3 Patch available CNA

Remediation

Session Smart Router is fixed in 7.0.5, 7.1.7 and 7.2.3. Session Smart Conductor is fixed in 7.0.5, 7.1.7 and 7.2.3.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

  • Fix · CNA Session Smart Router (Juniper Networks) Fixed in 7.0.5, 7.1.7, 7.2.3
  • Fix · CNA Session Smart Conductor (Juniper Networks) Fixed in 7.0.5, 7.1.7, 7.2.3

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    Juniper Networks Session Smart Conductor, Session Smart Router — supportportal.juniper.net/JSA112183

    18 records Highest priority Priority MEDIUM 6 MEDIUM, 12 LOW

    Other records, highest priority first

    • TI-2026-82040 Missing authentication in Juniper Session Smart Router grants admin accessPriority MEDIUM 49
    • TI-2026-82037 OS command injection in Juniper Session Smart Conductor allows root commandsPriority MEDIUM 43
    • TI-2026-82044 OS command injection in Juniper Session Smart Router and ConductorPriority MEDIUM 42
    Show all 18 records → Advisory →

Timeline

  1. 2026-10-28 Threatist record created from CVE-2026-103401
  2. 2026-10-28 Alias added: GHSA-mw3r-9657-3g58
  3. 2026-10-30 Priority changed: MEDIUM → LOW
  4. 2026-11-06 CISA SSVC decision points changed
  5. 2026-11-06 Priority changed: LOW → MEDIUM

References

Advisory 1

  • TI-2023-18638 Junos OS: EX and SRX Series: A PHP vulnerability in J-Web allows an unauthenticated to… KEVCVSS 3.1CRITICAL 9.8
  • TI-2020-01585 Out of Cycle Security Advisory: Junos OS: Security vulnerability in J-Web and web based (HTTP/HTTPS) services KEVCVSS 3.1CRITICAL 9.8
  • TI-2015-06436 Juniper ScreenOS 6.2.0r15 through 6.2.0r18, 6.3.0r12 before 6.3.0r12b, 6.3.0r13 before… KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-20885 Apache Commons Text prior to 1.10.0 allows RCE when applied to untrusted input due to insecure interpolation defaults CVSS 3.1CRITICAL 9.8
  • TI-2015-04610 Assertion failure in ISC BIND named via TKEY queries KEVCVSS 3.1HIGH 7.5
  • TI-2025-15550 Junos OS: An local attacker with shell access can execute arbitrary code KEVCVSS 4.0MEDIUM 6.7
See all 1284 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences