CVE-2020-36872
BACnet Test Server 1.01 Malformed BVLC Length DoS
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-400 |
| Vendor | bacnet interoperability test services, inc. |
| Product | bacnet test server |
| Published | Nov 26, 2025 |
| Last Updated | Apr 7, 2026 |
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Affected Versions
BACnet Interoperability Test Services, Inc. / BACnet Test Server
0 ≤ 1.01
References
zeroscience.mk: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2020-5597.php exploit-db.com: https://www.exploit-db.com/exploits/48860 packetstormsecurity.com: https://packetstormsecurity.com/files/159504 cxsecurity.com: https://cxsecurity.com/issue/WLB-2020100045 bac-test.com: https://www.bac-test.com/ vulncheck.com: https://www.vulncheck.com/advisories/bacnet-test-server-malformed-bvlc-length-dos
Credits
Gjoko Krstic of Zero Science Lab