EUVD-2026-2688

An Incorrect Initialization of Resource vulnerability in the Internal Device Manager IDM of Juniper Networks Junos OS on EX4000 models allows an unauthenticated, network-based attacker to cause a Denial-of-Service DoS. On EX4000 models with 48 ports EX4000-48T, EX4000-48P, EX4000-48MP a high volu...

CVE-2026-21913 Junos OS: EX4000: A high volume of traffic destined to the device leads to a crash and restart

An Incorrect Initialization of Resource vulnerability in the Internal Device Manager IDM of Juniper Networks Junos OS on EX4000 models allows an unauthenticated, network-based attacker to cause a Denial-of-Service DoS. On EX4000 models with 48 ports EX4000-48T, EX4000-48P, EX4000-48MP a high volu...

CVE-2026-21913

An Incorrect Initialization of Resource vulnerability in the Internal Device Manager IDM of Juniper Networks Junos OS on EX4000 models allows an unauthenticated, network-based attacker to cause a Denial-of-Service DoS. On EX4000 models with 48 ports EX4000-48T, EX4000-48P, EX4000-48MP a high volu...

EUVD-2026-2682

A Time-of-check Time-of-use TOCTOU Race Condition vulnerability in the method to collect FPC Ethernet firmware statistics of Juniper Networks Junos OS on MX10k Series allows a local, low-privileged attacker executing the 'show system firmware' CLI command to cause an LC480 or LC2101 line card to...

CVE-2026-21912 Junos OS: MX10k Series: 'show system firmware' CLI command may lead to LC480 or LC2101 line card reset

A Time-of-check Time-of-use TOCTOU Race Condition vulnerability in the method to collect FPC Ethernet firmware statistics of Juniper Networks Junos OS on MX10k Series allows a local, low-privileged attacker executing the 'show system firmware' CLI command to cause an LC480 or LC2101 line card to...

CVE-2026-21912 Junos OS: MX10k Series: 'show system firmware' CLI command may lead to LC480 or LC2101 line card reset

A Time-of-check Time-of-use TOCTOU Race Condition vulnerability in the method to collect FPC Ethernet firmware statistics of Juniper Networks Junos OS on MX10k Series allows a local, low-privileged attacker executing the 'show system firmware' CLI command to cause an LC480 or LC2101 line card to...

CVE-2026-21912

A Time-of-check Time-of-use TOCTOU Race Condition vulnerability in the method to collect FPC Ethernet firmware statistics of Juniper Networks Junos OS on MX10k Series allows a local, low-privileged attacker executing the 'show system firmware' CLI command to cause an LC480 or LC2101 line card to...

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...

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 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

CVE-2026-21911 affects Juniper Networks Junos OS Evolved via an Incorrect Calculation in the Layer 2 Control Protocol Daemon (l2cpd). An unauthenticated, network-adjacent attacker can flap the management interface to disrupt MAC learning over label-switched interfaces (LSI). Impact described in t...

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-2026-21910

CVE-2026-21910 affects Junos OS on EX4k Series and QFX5k Series with EVPN-VXLAN LAG/VPLAG. An unauthenticated, network-adjacent attacker can trigger a link flap, which in configurations with multiple load-balanced next-hops can cause Inter-VNI traffic to drop, resulting in DoS. Recovery requires ...

CVE-2026-21910 Junos OS: EX4k Series, QFX5k Series: In an EVPN-VXLAN configuration link flaps cause Inter-VNI traffic drop

An Improper Check for Unusual or Exceptional Conditions vulnerability in the packet forwarding engine PFE of Juniper Networks Junos OS on EX4k Series and QFX5k Series platforms allows an unauthenticated network-adjacent attacker flapping an interface to cause traffic between VXLAN Network...

CVE-2026-21910

An Improper Check for Unusual or Exceptional Conditions vulnerability in the packet forwarding engine PFE of Juniper Networks Junos OS on EX4k Series and QFX5k Series platforms allows an unauthenticated network-adjacent attacker flapping an interface to cause traffic between VXLAN Network...

CVE-2026-21910 Junos OS: EX4k Series, QFX5k Series: In an EVPN-VXLAN configuration link flaps cause Inter-VNI traffic drop

An Improper Check for Unusual or Exceptional Conditions vulnerability in the packet forwarding engine PFE of Juniper Networks Junos OS on EX4k Series and QFX5k Series platforms allows an unauthenticated network-adjacent attacker flapping an interface to cause traffic between VXLAN Network...

CVE-2026-21909 Junos OS and Junos OS Evolved: Receipt of specific IS-IS update packet causes memory leak leading to RPD crash

A Missing Release of Memory after Effective Lifetime vulnerability in the routing protocol daemon rpd Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated attacker controlling an adjacent IS-IS neighbor to send a specific update packet causing a memory leak. Continued receipt...

CVE-2026-21909

A Missing Release of Memory after Effective Lifetime vulnerability in the routing protocol daemon rpd Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated attacker controlling an adjacent IS-IS neighbor to send a specific update packet causing a memory leak. Continued receipt...

CVE-2026-21909 Junos OS and Junos OS Evolved: Receipt of specific IS-IS update packet causes memory leak leading to RPD crash

A Missing Release of Memory after Effective Lifetime vulnerability in the routing protocol daemon rpd Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated attacker controlling an adjacent IS-IS neighbor to send a specific update packet causing a memory leak. Continued receipt...

CVE-2026-21909

CVE-2026-21909 affects Junos OS and Junos OS Evolved: a Missing Release of Memory after Effective Lifetime vulnerability in rpd allows an unauthenticated adjacent IS-IS neighbor to craft packets that leak memory, eventually crashing rpd and causing DoS. Affected: Junos OS from 23.2 before 23.2R2;...