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Integer overflow in Juniper Session Smart Router causes denial of service

Priority LOW 39CWE-190Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-190 and the CVSS impact.

Summary

Juniper Networks Session Smart Router from 0 before 7.0.5, from 7.1.0 before 7.1.7, and from 7.2.0 before 7.2.3 contains an integer overflow in the DPI certificate scanner. An unauthenticated remote attacker can cause a denial of service by sending a specially crafted TLS server certificate that the router inspects.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

An Integer Overflow vulnerability in the DPI certificate scanner in Juniper Networks Session Smart Router allows an unauthenticated remote attacker to cause a denial of service via a specially crafted TLS server certificate.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00322 25th percentileScored 2026-11-07
Fix Fixed Session Smart Router (Juniper Networks): 7.0.5, 7.1.7, 7.2.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

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
  • 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

Remediation

Upgrade Juniper Networks Session Smart Router to version 7.0.5, 7.1.7, or 7.2.3, depending on the release train in use.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA Session Smart Router (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 Router — supportportal.juniper.net/JSA112183

    16 records Highest priority Priority MEDIUM 5 MEDIUM, 11 LOW

    Other records, highest priority first

    • TI-2026-82040 Missing authentication in Juniper Session Smart Router grants admin accessPriority MEDIUM 49
    • TI-2026-82044 OS command injection in Juniper Session Smart Router and ConductorPriority MEDIUM 42
    • TI-2026-82034 OS command injection in Juniper Session Smart Router and ConductorPriority MEDIUM 42

Timeline

  1. 2026-10-28 Threatist record created from CVE-2026-103410
  2. 2026-10-28 Alias added: GHSA-74v7-mwh3-4x8c
  3. 2026-10-29 CISA SSVC decision points changed
  4. 2026-10-29 Priority changed: MEDIUM → LOW

References

  • 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