Vulnerability · Published May 29, 2026 · Assigned by INCIBE
CVE-2026-9509Uncaught exception vulnerability in Suprema's BioStar
High 8.7
In plain English
A high-severity security flaw in BioStar 2 (server) from Suprema. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 29% of all known vulnerabilities).
Official description
An unhandled exception in Suprema BioStar 2 (Server), versions 2.9.8, 2.9.10, and 2.9.11, that allows an unauthenticated remote attacker to cause a denial of service (DoS) by sending HTTP POST requests to the ‘/api/migration’ endpoint. This request triggers a failure that halts critical processes, leaving the system offline until the services or server are manually restarted. As a result, access control readers cease to function, and potential failures may occur in third-party integrations. Since the exploit requires no privileges or user interaction and is trivial to automate, the impact on availability is high, and the effect extends to interconnected systems.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Suprema | BioStar 2 (server) | v2.9.11v2.9.10v2.9.8 |
Weakness: CWE-248 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N