CVE-2026-55401
MediumCVSS 6.9Exploitation Probability (EPSS)
Low risk24th percentile - higher than 24% of all known CVEs
Summary
CVE-2026-55401 is a null dereference vulnerability in the load-balancing subsystem of Secure Access servers prior to 14.57. Attackers can send an unauthenticated packet to a Secure Access server with load balancing enabled, which results in the internal load balancer crashing. After a successful attack, the Secure Access server is still able to accept connections and is still able to issue a failover to connected clients.
Risk Assessment
The risk is the possibility of disrupting the load balancer, which could affect service availability and infrastructure stability.
Recommendation
It is recommended to upgrade Secure Access servers to version 14.57 or later, which includes a fix for this vulnerability.
Original NVD description (English source)
CVE-2026-55401 is a null dereference vulnerability on the load-balancing sub-system of Secure Access servers prior to 14.57. Attackers can send an unauthenticated packet to a Secure Access server with load balancing enabled, which results in the internal load balancer crashing. After a successful attack, the Secure Access server is still able to accept connections and is still able to issue a failover to connected clients. https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L