CVE-2020-36872
High
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.
SeverityHigh
CVSS8.7
Exploit probability—
ProductBACnet Test Server
PublishedNov 26, 2025
First seenNov 26, 2025
Weakness typeCWE-400Uncontrolled resource consumption
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| BACnet Interoperability Test Services, Inc. BACnet Test Server | v ≤ 1.01 | — |
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