Summary
CVE-2026-102182 is a stack-based buffer overflow in the kmd component of Juniper Networks Junos OS on MX Series devices. An unauthenticated network attacker can execute code as root by sending specific IKE certificate-based packets. The CVSS v3.1 base score is 9.8 (Critical).
Technical details
- Root cause: stack-based buffer overflow in the kmd component of Junos OS.
- Trigger conditions: specific IKE certificate-based packets sent to an affected MX Series device.
- Attack vector: network, with no authentication and no user interaction required.
- Impact: remote code execution as root.
Affected software
Junos OS on MX Series:
- All versions before 23.2R2-S7.7
- 23.4 versions before 23.4R2-S8.13
- 24.2 versions before 24.2R2-S5.5
- 24.4 versions before 24.4R2-S5
- 25.2 versions before 25.2R2-S2
- 25.4 versions before 25.4R1-S3
- 26.2 versions before 26.2R1-S2
Severity
CVSS v3.1 base score: 9.8 (Critical), network attack vector, low attack complexity, no privileges required. The CVE record also lists a CVSS v4.0 score of 9.3 (Critical). The full vector string was not retrievable from the sources reviewed; see the vendor advisory JSA112196 for details.
Mitigation and recommended actions
- Immediate: upgrade to a fixed release: 23.2R2-S7.7, 23.4R2-S8.13, 24.2R2-S5.5, 24.4R2-S5, 25.2R2-S2, 25.4R1-S3, 25.4R2, 26.2R1-S2, 26.2R2, 26.4R1, or any later release.
- Juniper states there are no known workarounds for this issue.

