PT-2026-56986

Name of the Vulnerable Software and Affected Versions Junos OS on EX2300, EX3400, EX4000, EX4100 and EX4400 versions prior to 23.2R2-S7 Junos OS on EX2300, EX3400, EX4000, EX4100 and EX4400 versions 23.4 prior to 23.4R2-S8 Junos OS on EX2300, EX3400, EX4000, EX4100 and EX4400 versions 24.2 prior ...

CVE-2026-21903

A Stack-based Buffer Overflow vulnerability in the Packet Forwarding Engine pfe of Juniper Networks Junos OS allows a network-based attacker, authenticated with low privileges to cause a Denial-of-Service DoS. Subscribing to telemetry sensors at scale causes all FPC connections to drop, resulting...

CVE-2026-21903

A Stack-based Buffer Overflow vulnerability in the Packet Forwarding Engine pfe of Juniper Networks Junos OS allows a network-based attacker, authenticated with low privileges to cause a Denial-of-Service DoS. Subscribing to telemetry sensors at scale causes all FPC connections to drop, resulting...

CVE-2026-21903

A Stack-based Buffer Overflow vulnerability in the Packet Forwarding Engine pfe of Juniper Networks Junos OS allows a network-based attacker, authenticated with low privileges to cause a Denial-of-Service DoS. Subscribing to telemetry sensors at scale causes all FPC connections to drop, resulting...

CVE-2026-21903

CVE-2026-21903 is a stack-based buffer overflow in the Packet Forwarding Engine (pfe) of Juniper Networks Junos OS. A network-based attacker with low privileges can trigger a Denial-of-Service by subscribing to telemetry sensors at scale, which causes all FPC connections to drop, an FPC crash, an...

CVE-2026-21903: Stack-based Buffer Overflow

A Stack-based Buffer Overflow vulnerability in the Packet Forwarding Engine pfe of Juniper Networks Junos OS allows a network-based attacker, authenticated with low privileges to cause a Denial-of-Service DoS. Subscribing to telemetry sensors at scale causes all FPC connections to drop, resulting...