High severityNVD Advisory· Published Nov 26, 2025· Updated Apr 15, 2026

CVE-2020-36872

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.

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

cxsecurity.com/issue/WLB-2020100045nvd
packetstormsecurity.com/files/159504nvd
www.bac-test.comnvd
www.exploit-db.com/exploits/48860nvd
www.vulncheck.com/advisories/bacnet-test-server-malformed-bvlc-length-dosnvd
www.zeroscience.mk/en/vulnerabilities/ZSL-2020-5597.phpnvd

News mentions

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