CVE-2026-33803

A missing synchronization vulnerability in the sFlow collector handler of Junos OS Evolved on QFX Series allows an unauthenticated adjacent attacker to cause a Denial-of-Service (DoS). When the reachability of an sFlow collector changes and the sFlow thread simultaneously accesses next-hop data, the evo-pfemand process crashes, blocking traffic forwarding until automatic restart.

An Improper Restriction of Communication Channel to Intended Endpoints vulnerability in Juniper Networks Junos OS Evolved allows an unauthenticated, network-based attacker to cause license exhaustion. Due to incorrect initialization, a process that should only communicate internally can be reached over the network via an open port, leading to unauthorized access to license management.

A vulnerability in the advanced forwarding toolkit (evo-aftmand) of Juniper Networks Junos OS Evolved on PTX Series allows an unauthenticated network-based attacker to generate continuous routing updates, causing the evo-aftmand process on the PFE to crash, leading to a Denial-of-Service (DoS). Successful exploitation depends on a sequence of events outside the attacker's direct control.

Missing authentication for a critical function in FPCs of Junos OS Evolved on PTX series allows a local authenticated attacker with low privileges to gain direct access to FPCs as a high-privileged user, potentially leading to full compromise.