How severe is CVE-2020-36872?

CVE-2020-36872 has a CVSS 4.0 base score of 8.7, rated high severity.

Is CVE-2020-36872 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2020-36872?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2020-36872 have an EU (EUVD) identifier?

Yes. CVE-2020-36872 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2020-30820.

When was CVE-2020-36872 published?

CVE-2020-36872 was published on 2025-11-26 and last updated on 2026-06-17.

CVE-2020-36872

CVE-2020-36872 is a high-severity vulnerability with a CVSS 4.0 base score of 8.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-400.

Key facts

Severity: High (CVSS 4.0 base score 8.7)
EPSS exploit prediction: 0% (35th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2020-30820
Weakness: CWE-400
Published: 2025-11-26
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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. 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.
How severe is CVE-2020-36872?: CVE-2020-36872 has a CVSS 4.0 base score of 8.7, rated high severity.
Is CVE-2020-36872 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2020-36872?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2020-36872 have an EU (EUVD) identifier?: Yes. CVE-2020-36872 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2020-30820.
When was CVE-2020-36872 published?: CVE-2020-36872 was published on 2025-11-26 and last updated on 2026-06-17.

References

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