CVE-2020-36872CWE-400

BACnet Test Server 1.01 Malformed BVLC Length DoS

High · published November 26, 2025

CVSS v4.0
8.7
EPSS
0%
Percentile
41.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
8.7 · HIGH
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
EPSS
0.00497 · 41.7th percentile
Weakness
CWE-400 · Uncontrolled Resource Consumption
Published
2025-11-26T22:13Z
EPSS history
Timeline
  • 26 NOV 22:13Z
    BACnet Test Server 1.01 Malformed BVLC Length DoS
    cvelistv5