Vulnerability in Juniper Networks Junos OS

[ Why it matters ]Priority signals

• Critical severity: CVSS 9.8

[ Description ]Official description

An Integer Underflow vulnerability in the kernel of Juniper Networks Junos OS with Extended Echo configured allows an unauthenticated, network-based attacker to cause a denial of service by a kernel crash.

[ 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/JSA112188