{"id":"CVE-2020-36872","state":"PUBLISHED","title":"BACnet Test Server 1.01 Malformed BVLC Length DoS","description":"BACnet Test Server versions up to and including 1.01 contains a remote denial of service vulnerability in its BACnet/IP BVLC packet handling. The server fails to properly validate the BVLC Length field in incoming UDP BVLC frames on the default BACnet port (47808/udp). A remote unauthenticated attacker can send a malformed BVLC Length value to trigger an access violation and crash the application, resulting in a denial of service.","publishedAt":"2025-11-26T22:13:47.565Z","updatedAt":"2026-07-28T01:47:03.790Z","severity":{"score":8.7,"label":"High","version":"4.0","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","source":"VulnCheck"},"assigner":"VulnCheck","products":["BACnet Interoperability Test Services, Inc. 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