CVE-2026-102182 Juniper Networks CVE debrief

Who should care

Defenders responsible for Juniper Networks Junos OS on MX Series, including security teams, network administrators, and system administrators, should assess exposure and prioritize patching. They should review and apply Juniper Networks' patch for affected Junos OS versions on MX Series, verify and update Junos OS versions to 21.2R3-S11 or later, and verify and update Junos OS versions to 21.4R3-S12 or later.

Why it matters

CVE-2026-102182 is a critical vulnerability in Juniper Networks Junos OS on MX Series, allowing unauthenticated code execution as root. Defenders should prioritize patching affected versions to prevent potential exploitation.

• Unauthenticated network attackers may execute code as root
• Potential for code execution via specific IKE certificate-based packets
• Need to verify and update Junos OS versions to prevent exploitation
• Possible impact on network security and integrity

Technical summary

A Stack-based Buffer Overflow vulnerability in the kmd component of Juniper Networks Junos OS on MX Series allows an unauthenticated network attacker to execute code as root via specific IKE certificate-based packets. This issue affects Junos OS on MX Series: * All versions before 21.2R3-S11; * from 21.4 before 21.4R3-S12; * from 22.2 before 22.2R3-S8; * from 22.3 before 22.3R3-S5; * from 22.4 before 22.4R3-S9.

Defensive priority

High

Recommended defensive actions

• Review and apply Juniper Networks' patch for affected Junos OS versions on MX Series
• Verify and update Junos OS versions to 21.2R3-S11 or later
• Verify and update Junos OS versions to 21.4R3-S12 or later
• Verify and update Junos OS versions to 22.2R3-S8 or later
• Verify and update Junos OS versions to 22.3R3-S5 or later
• Verify and update Junos OS versions to 22.4R3-S9 or later

Evidence notes

The CVE record and source item provide details on the vulnerability, including affected versions and a reference to a vendor advisory. The vulnerability is a Stack-based Buffer Overflow in the kmd component of Juniper Networks Junos OS on MX Series. The CVE record was published on 2026-10-14T16:57:50.508Z and has not been modified since then. There are no known instances of exploitation, but defenders should verify and update Junos OS versions to prevent exploitation.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.