Vulnerability in Juniper Networks Junos OS

[ Why it matters ]Priority signals

• Critical severity: CVSS 9.8

[ Description ]Official description

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 requires IKE to be enabled with an RSA-signature IKE policy to be vulnerable. 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;

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• NCSC-NL16 Oct 2026NCSC-2026-0430

  Vulnerabilities fixed in Juniper Networks Junos OS Translated from Dutch

  Probability/damage M/HCVE-2026-103994CVE-2026-102182CVE-2026-102176+12 more CVEs
• CERT-FR15 Oct 2026CERTFR-2026-AVI-1322

  Multiple vulnerabilities in Juniper Networks products Translated from French

  Multiple vulnerabilities have been discovered in Juniper Networks products. Some of them allow an attacker to cause remote arbitrary code execution, privilege escalation and remote denial of service.

  CVE-2026-102045CVE-2026-101985CVE-2026-101982+155 more CVEs

[ References ]References

• supportportal.juniper.net/JSA112196