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TI-2026-74292 Aliases CVE-2026-102084

Junos OS on SRX Series buffer overflow allows remote code execution

Priority MEDIUM 42CWE-1286Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

Junos OS on SRX Series affects 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 and from 25.4 before 25.4R1-S3. Improper input validation (CWE-1286) in the VPN daemon causes a buffer overflow when an ADVPN peer sends a malformed message. An authenticated network attacker with the shared secret or a compromised peer can take complete control of the device, though this is considerably difficult.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00509 43rd percentileScored 2026-11-07
Fix Fixed Junos OS (Juniper Networks): 23.2R2-S7.7, 23.4R2-S7, 24.2R2-S4 +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
JuniperJunos OSbefore 23.2R2-S7.7; 23.4 to before 23.4R2-S7; 24.2 to before 24.2R2-S4; 24.4 to before 24.4R2-S3; 25.2 to before 25.2R2; 25.4 to before 25.4R1-S323.2R2-S7.7, 23.4R2-S7, 24.2R2-S4, 24.4R2-S3, 25.2R2, 25.4R1-S3Patch availableCNA
  • Junos OS VendorJuniper Affected before 23.2R2-S7.7; 23.4 to before 23.4R2-S7; 24.2 to before 24.2R2-S4; 24.4 to before 24.4R2-S3; 25.2 to before 25.2R2; 25.4 to before 25.4R1-S3 Fixed in 23.2R2-S7.7, 23.4R2-S7, 24.2R2-S4, 24.4R2-S3, 25.2R2, 25.4R1-S3 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*——Juniper
  • cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:* Versions — — ·Juniper

Remediation

Upgrade Junos OS on SRX Series to 23.2R2-S7.7, 23.4R2-S7, 24.2R2-S4, 24.4R2-S3, 25.2R2 or 25.4R1-S3, matching your release line.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA Junos OS (Juniper Networks) Fixed in 23.2R2-S7.7, 23.4R2-S7, 24.2R2-S4, 24.4R2-S3, 25.2R2, 25.4R1-S3

Timeline

  1. 2026-10-15 Threatist record created from CVE-2026-102084
  2. 2026-10-16 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