CVE-2026-101936: CWE-617 Reachable Assertion in Juniper Networks Junos OS

This vulnerability (CVE-2026-101936) affects the srxpfe process in Juniper Networks Junos OS running on SRX Series devices. It is classified as CWE-617 (Reachable Assertion), meaning that an assertion in the code can be triggered by crafted input, leading to a denial of service condition. An attacker on an adjacent network can exploit this by sending malformed firewall-authentication synchronization traffic over chassis-cluster fabric interfaces, causing the data plane to become unavailable. The CVSS 3.1 vector indicates the attack requires adjacent network access, low attack complexity, no privileges, and no user interaction, with impact limited to availability. The affected versions span multiple release trains before certain patch levels, but no direct patch or remediation details are provided in the source data.

An attacker with access to an adjacent network can cause a denial of service on the data plane of affected Junos OS SRX Series devices by exploiting this vulnerability. There is no impact on confidentiality or integrity. The DoS could disrupt network traffic passing through the device, potentially affecting network availability.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no patch or official fix information is provided, users should monitor Juniper Networks advisories for updates. Until a fix is available, limiting access to chassis-cluster fabric interfaces and restricting adjacent network access to trusted entities may reduce exposure.