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Advisory severityHigh8.1Juniper Networks Updated

High [CVE-2026-102084] Improper Validation of Syntactic Correctness of Input vulnerability in the VPN daemon of Juniper Networks Junos OS on SRX Series allows an authenticated, network-based attacker to take complete control of the device

This high-severity Juniper Networks advisory covers CVE-2026-102084 affecting Junos OS.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-102084 Source published Source updated

VulniPulse record published Record updated

CVE-2026-102084
Affected products & platforms
Juniper NetworksJunos
Open source advisory

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Summary

An Improper Validation of Syntactic Correctness of Input vulnerability in the VPN daemon of Juniper Networks Junos OS on SRX Series allows an authenticated, network-based attacker to take complete control of the device.

If an SRX device configured for AutoDiscovery VPN (ADVPN) receives a message from a peer that contains one or more specifically malformed attributes, this will cause a buffer overflow, which can allow remote code execution and therefore allow an attacker to take complete control of the device.

To be able to carry out this attack an attacker must either have acquired the shared secret to impersonate a peer or have compromised an existing one, so this attack is considerably difficult.

This issue affects Junos OS on SRX Series:

  • All versions before 23.2R2-S7.7;
  • from 23.4 before 23.4R2-S7;
  • from 25.4 before 25.4R1-S3.
Affected versions
  • * All versions before 23

Official advisory · high-confidence parse· fetched 7 days ago·verify at source

Fixed versions
  • 23.2R2-S7.7
  • 23.4R2-S7
  • 24.2R2-S4
  • 24.4R2-S3
  • 25.2R2
  • 25.4R1-S3

Official advisory · high-confidence parse· fetched 7 days ago·verify at source

Mitigation

Upgrade to a fixed release: 23.2R2-S7.7, 23.4R2-S7, 24.2R2-S4, 24.4R2-S3, 25.2R2, 25.4R1-S3. That is the remediation for this advisory.

The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.

Official advisory · high-confidence parse· fetched 7 days ago·verify at source

Discussion(0)

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