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Vulnerabilities

Vulnerability · CVE-2020-36872

BACnet Test Server versions up to and including 1.01 contains a remote denial of service vulnerability in its BACnet/IP BVLC packet handling.

Published Nov 26, 2025 · catalog updated Jul 28, 2026 · BACnet Interoperability Test Services, Inc. BACnet Test Server

Last checked Nov 5, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2020-36872. EPSS is 0.53%. Act only if a listed version of BACnet Interoperability Test Services, Inc. BACnet Test Server is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.7
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.53%
Remediation
Advisory link
Affected products
vendor BACnet Interoperability Test Services, Inc. BACnet Test Server 0 ≤1.01

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor BACnet Interoperability Test Services, Inc. BACnet Test Server 0 ≤1.010 ≤1.01

How to fix CVE-2020-36872

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2020-36872. EPSS is 0.53%. Act only if a listed version of BACnet Interoperability Test Services, Inc. BACnet Test Server is installed.

Which versions are affected?

Compare what you have installed with BACnet Interoperability Test Services, Inc. BACnet Test Server 0 ≤1.01 0 ≤1.01. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.53%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Nov 26, 2025 · EUVD

    Detected

    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,

  2. Jul 28, 2026 · EUVD

    Updated

    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,

Sources

  • CVE.orgVulnerability recordCVE-2020-36872

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2020-36872

    30-day exploitation probability 0.53%

    first.org
  • EUVDVulnerability recordEUVD-2020-30820

    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 u

    euvd.enisa.europa.eu
  • Packet Storm SecurityCited referencehttps://packetstormsecurity.com/files/159504

    Packet Storm link already published on the finding.

    packetstormsecurity.com

References

Freshness

Last verified in this catalog Nov 5, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 5, 2026
  • Packet Storm SecurityNov 5, 2026
  • CVE.orgOct 26, 2026
  • EUVDOct 26, 2026