CVE-2026-21911

An Incorrect Calculation vulnerability in the Layer 2 Control Protocol Daemon l2cpd of Juniper Networks Junos OS Evolved allows an unauthenticated network-adjacent attacker flapping the management interface to cause the learning of new MACs over label-switched interfaces LSI to stop while...

EUVD-2026-2699

An Incorrect Calculation vulnerability in the Layer 2 Control Protocol Daemon l2cpd of Juniper Networks Junos OS Evolved allows an unauthenticated network-adjacent attacker flapping the management interface to cause the learning of new MACs over label-switched interfaces LSI to stop while...

CVE-2026-21911 Junos OS Evolved: Flapping management interface causes MAC learning on label-switched interfaces to stop

An Incorrect Calculation vulnerability in the Layer 2 Control Protocol Daemon l2cpd of Juniper Networks Junos OS Evolved allows an unauthenticated network-adjacent attacker flapping the management interface to cause the learning of new MACs over label-switched interfaces LSI to stop while...

CVE-2026-21911

An Incorrect Calculation vulnerability in the Layer 2 Control Protocol Daemon l2cpd of Juniper Networks Junos OS Evolved allows an unauthenticated network-adjacent attacker flapping the management interface to cause the learning of new MACs over label-switched interfaces LSI to stop while...

PT-2026-3125

Name of the Vulnerable Software and Affected Versions Juniper Networks Junos OS Evolved versions prior to 21.4R3-S7-EVO Juniper Networks Junos OS Evolved versions 22.2 through 22.2R3-S4-EVO Juniper Networks Junos OS Evolved versions 22.3 through 22.3R3-S3-EVO Juniper Networks Junos OS Evolved...

Juniper Networks Junos OS and Junos OS Evolved security vulnerabilities

Juniper Networks Junos OS and Juniper Networks Junos OS Evolved are both products of Juniper Networks, Inc.Juniper Networks Junos OS is a network operating system designed for use with the company's hardware devices. The operating system provides a secure programming interface and the Junos SDK...