Denial of Service Vulnerability in BACnet Stack Open Source Protocol Library
CVE-2026-52789

7.5HIGH

Key Information:

Vendor

Bacnet-stack

Status
Bacnet-stack
Vendor
CVE Published:
13 November 2026

What is CVE-2026-52789?

The BACnet Stack is an open-source protocol library designed for embedded systems. A vulnerability has been identified in this library's ReadPropertyMultiple (RPM) handler, which can be exploited by sending a malformed RPM request packet that lacks the necessary closing tags. This oversight causes the handler to enter an infinite loop, leading to a Denial of Service condition. Users are strongly advised to upgrade to patched versions 1.4.5, 1.5.1, or 1.6.0 to mitigate this issue.

Affected Version(s)

bacnet-stack < 1.4.5 < 1.4.5

bacnet-stack < 1.5.1 < 1.5.1

bacnet-stack < 1.6.0 < 1.6.0

References

https://github.com/bacnet-stack/bacnet-stack/security/adv...
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https://github.com/bacnet-stack/bacnet-stack/pull/1374
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CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.