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TI-2026-82042 Aliases CVE-2026-103411GHSA-qfqf-wwr7-vhxm

Integer underflow in Juniper Session Smart Router DHCP parsing

Priority LOW 30CWE-191Published · Updated

Key facts

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

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

Summary

Juniper Networks Session Smart Router versions before 7.0.5, from 7.1.0 before 7.1.7 and from 7.2.0 before 7.2.3 are affected. An integer underflow in DhcpMessageDecoder (CWE-191) is triggered during DHCP option parsing. An unauthenticated attacker with local network access can send a malicious DHCP reply to disclose information or crash the service.

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

Description from the CNA

An Integer Underflow vulnerability in DhcpMessageDecoder in Juniper Networks Session Smart Router allows an attacker with local network access to cause information disclosure and a denial of service via a malicious DHCP reply.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00174 6th 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
No
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 Session Smart Router to version 7.0.5, 7.1.7 or 7.2.3, depending on the release branch 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
    Show all 16 records → Advisory →

Timeline

  1. 2026-10-28 Threatist record created from CVE-2026-103411
  2. 2026-10-28 Alias added: GHSA-qfqf-wwr7-vhxm
  3. 2026-10-30 Priority changed: MEDIUM → LOW
  4. 2026-11-05 CISA SSVC decision points changed

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