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CVE-2026-102084NVD
Vulnerability 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 24.2 before 24.2R2-S4;
* from 24.4 before 24.4R2-S3;
* from 25.2 before 25.2R2;
* from 25.4 before 25.4R1-S3.
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 24.2 before 24.2R2-S4;
* from 24.4 before 24.4R2-S3;
* from 25.2 before 25.2R2;
* from 25.4 before 25.4R1-S3.
CVSS v4.0 Base Metrics — Score 9.2 (CRITICAL)
Attack VectorNetwork
Attack ComplexityHigh
Attack RequirementsNone
Privileges RequiredNone
User InteractionNone
Confidentiality (Vulnerable System)High
Integrity (Vulnerable System)High
Availability (Vulnerable System)High
Confidentiality (Subsequent System)None
Integrity (Subsequent System)None
Availability (Subsequent System)Low
CVSS v3.1 Base Metrics — Score 8.1 (HIGH)
Attack VectorNetwork
Attack ComplexityHigh
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
Affected & Patched Versions
- Juniper Networks Junos OS < 23.2R2-S7.7
- Juniper Networks Junos OS >= 23.4 and < 23.4R2-S7
- Juniper Networks Junos OS >= 24.2 and < 24.2R2-S4
- Juniper Networks Junos OS >= 24.4 and < 24.4R2-S3
- Juniper Networks Junos OS >= 25.2 and < 25.2R2
- Juniper Networks Junos OS >= 25.4 and < 25.4R1-S3
- Juniper Networks Junos OS 23.2R2-S7.7
- Juniper Networks Junos OS 23.4R2-S7
- Juniper Networks Junos OS 24.2R2-S4
- Juniper Networks Junos OS 24.4R2-S3
- Juniper Networks Junos OS 25.2R2
- Juniper Networks Junos OS 25.4R1-S3