CVE-2020-36872

BACnet Test Server 1.01 Malformed BVLC Length DoS

HIGH
8.7
CVSS Score
Published: November 26, 2025 at 10:13 PM UTC
Updated: June 17, 2026 at 03:16 AM UTC
2 products affected across 2 vendorsInteroperability Solution XDSBACnet Test Server

Using BACnet Test Server by BACnet Interoperability Test Services, Inc.?

Get instant alerts when new vulnerabilities affect BACnet Test Server - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Severity
HIGH8.7
Exploit prediction
EPSS 0.5%
SSVC
PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.7HIGHVulnCheck
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-400

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Free plan, no card