CVE-2026-21918 Junos OS: SRX and MX Series: When TCP packets occur in a specific sequence flowd crashes

A Double Free vulnerability in the flow processing daemon flowd of Juniper Networks Junos OS on SRX and MX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service DoS. On all SRX and MX Series platforms, when during TCP session establishment a specific sequence of...

EUVD-2026-2697

A Double Free vulnerability in the flow processing daemon flowd of Juniper Networks Junos OS on SRX and MX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service DoS. On all SRX and MX Series platforms, when during TCP session establishment a specific sequence of...

EUVD-2026-2689

An Improper Validation of Syntactic Correctness of Input vulnerability in the Web-Filtering module of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service DoS. If an SRX device configured for UTM Web-Filtering receives a specifical...

CVE-2026-21917 Junos OS: SRX Series: Specifically malformed SSL packet causes FPC crash

An Improper Validation of Syntactic Correctness of Input vulnerability in the Web-Filtering module of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service DoS. If an SRX device configured for UTM Web-Filtering receives a specifical...

CVE-2026-21917 Junos OS: SRX Series: Specifically malformed SSL packet causes FPC crash

An Improper Validation of Syntactic Correctness of Input vulnerability in the Web-Filtering module of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service DoS. If an SRX device configured for UTM Web-Filtering receives a specifical...

EUVD-2026-2683

An Improper Locking vulnerability in the GTP plugin of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service Dos. If an SRX Series device receives a specifically malformed GPRS Tunnelling Protocol GTP Modify Bearer Request message, ...

CVE-2026-21914

CVE-2026-21914 describes an Improper Locking vulnerability in the GTP plugin of Juniper Networks Junos OS on SRX Series. A specially crafted GTP Modify Bearer Request can cause a lock to be acquired and never released, preventing other threads from acquiring it, triggering a watchdog timeout and ...

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...

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

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

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 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;...

EUVD-2026-2696

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-2026-21908

Summary (CVE-2026-21908): A Use-After-Free in Juniper Networks Junos OS and Junos OS Evolved’s 802.1X daemon (dot1xd) can be triggered by a port bounce during a change in authorization (CoA). Successful exploitation could cause a crash (DoS) or potentially execute code with root privileges. Affec...

CVE-2026-21908 Junos OS and Junos OS Evolved: Use after free vulnerability In 802.1X authentication daemon can cause crash of the dot1xd process

A Use After Free vulnerability was identified in the 802.1X authentication daemon dot1xd of Juniper Networks Junos OS and Junos OS Evolved that could allow an authenticated, network-adjacent attacker flapping a port to crash the dot1xd process, leading to a Denial of Service DoS, or potentially...