PT-2025-48193 · Unknown · Bacnet Test Server

Gjoko Krstic · Published 2025-11-26 · Updated 2025-11-27 · CVE-2020-36872

Positive Technologies (AI Summary)

CVSS v4.0

8.7

High

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Name of the Vulnerable Software and Affected Versions BACnet Test Server versions up to and including 1.01

Description BACnet Test Server is susceptible to a remote denial of service. The server does not correctly validate the BVLC Length field within incoming UDP BVLC frames on the default BACnet port (47808/udp). An unauthenticated remote attacker can send a crafted BVLC Length value, causing an access violation and application crash, leading to a denial of service.

Recommendations Versions prior to 1.01 are vulnerable.

Exploit

Fix

DoS

Resource Exhaustion

Weakness Enumeration

CWE-400

Related Identifiers

CVE-2020-36872

Affected Products

Bacnet Test Server

References · 10

• 🔥 https://cxsecurity.com/issue/WLB-2020100045 · Exploit
• 🔥 https://exploit-db.com/exploits/48860 · Exploit
• 🔥 https://packetstormsecurity.com/files/159504 · Exploit
• 🔥 https://zeroscience.mk/en/vulnerabilities/ZSL-2020-5597.php · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2020-36872 · Security Note
• https://twitter.com/CVEnew/status/1993810861635391868 · Twitter Post
• https://bac-test.com · Note
• https://t.me/CVEtracker/38330 · Telegram Post
• https://t.me/cveNotify/144147 · Telegram Post
• https://vulncheck.com/advisories/bacnet-test-server-malformed-bvlc-length-dos · Note