Is CVE-2026-47217 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-47217 being exploited in the wild.

How severe is CVE-2026-47217?

High severity, with a CVSS score of 7.5, published 12 November 2026.

Which products and versions are affected?

BACnet Stack <=1.5.0; fixed in 1.4.4 and 1.5.1.

Is there a fix for CVE-2026-47217?

Yes: fixed in 1.4.4, 1.5.1. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-47217 attacked?

It is attacked over the network.

Am I affected by CVE-2026-47217?

Check whether you run BACnet Stack at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-47217: BACnet Stack uncontrolled recursion in Channel object

Q: Which products and versions are affected?

BACnet Stack <=1.5.0; fixed in 1.4.4 and 1.5.1.

Q: Is there a fix for CVE-2026-47217?

Yes: fixed in 1.4.4, 1.5.1. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is CVE-2026-47217 attacked?

It is attacked over the network.

Q: Am I affected by CVE-2026-47217?

Check whether you run BACnet Stack at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-47217 · Severity: high · CVSS 7.5 · Published 2026-11-12

BACnet Stack is a protocol library used in building automation systems to communicate across networked devices. A remote attacker can crash the default BACnet/IP server by sending specially crafted network packets that trigger unbounded recursion in the Channel object handler, causing a denial-of-service outage. No authentication is required, and the attack is reliable and remotely exploitable.

Technologies: BACnet Stack. Vendors: BACnet Stack.

Quick answers

Is CVE-2026-47217 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-47217 being exploited in the wild.
How severe is CVE-2026-47217?: High severity, with a CVSS score of 7.5, published 12 November 2026.
Which products and versions are affected?: BACnet Stack <=1.5.0; fixed in 1.4.4 and 1.5.1.
Is there a fix for CVE-2026-47217?: Yes: fixed in 1.4.4, 1.5.1. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-47217 attacked?: It is attacked over the network.
Am I affected by CVE-2026-47217?: Check whether you run BACnet Stack at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: 1.4.4, 1.5.1

Technical details

A stack overflow vulnerability exists in the Channel object's write path due to missing cycle detection in self-referential member lists. An attacker can persist a PROP_LIST_OF_OBJECT_PROPERTY_REFERENCES entry pointing back to the same Channel's PROP_PRESENT_VALUE; a subsequent WriteProperty request triggers recursive re-entry through Channel_Write_Property → Channel_Present_Value_Write → Channel_Write_Members → Device_Write_Property, exhausting stack space. The vulnerability requires network access to the BACnet/IP server and no prior authentication.

Affected products

bacnet-stack BACnet Stack <=1.5.0; fixed in 1.4.4 and 1.5.1

Timeline

2026-07-05: disclosed
2026-05-13: patched

References

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