Is CVE-2026-47259 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-47259 being exploited in the wild.

How severe is CVE-2026-47259?

High severity, with a CVSS score of 8.2, published 12 November 2026.

Which products and versions are affected?

BACnet Stack prior to 1.4.4, 1.5.1, and 1.6.0.

Is there a fix for CVE-2026-47259?

Yes: fixed in 1.4.4, 1.5.1, 1.6.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-47259 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-47259?

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-2026-47259: BACnet Stack stack-based buffer overflow in RemoveListElement

CVE-2026-47259 · Severity: high · CVSS 8.2 · Published 2026-11-12

BACnet Stack is an open-source protocol library used to implement the BACnet building automation standard in embedded devices and systems. A specially crafted RemoveListElement request can cause a stack-based buffer overflow in the Notification Class handler, crashing the device and potentially allowing code execution. An attacker on the network can send this malicious request without authentication to disrupt building control systems.

Technologies: BACnet Stack. Vendors: BACnet Stack.

Quick answers

Is CVE-2026-47259 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-47259 being exploited in the wild.
How severe is CVE-2026-47259?: High severity, with a CVSS score of 8.2, published 12 November 2026.
Which products and versions are affected?: BACnet Stack prior to 1.4.4, 1.5.1, and 1.6.0.
Is there a fix for CVE-2026-47259?: Yes: fixed in 1.4.4, 1.5.1, 1.6.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-47259 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-47259?: 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, 1.6.0

Technical details

A stack-based out-of-bounds write occurs in Notification_Class_Remove_List_Element() when decoding a RemoveListElement request targeting the Notification-Class.recipient-list. The vulnerable function allocates a fixed-size stack buffer (NC_MAX_RECIPIENTS = 10 entries) but lacks bounds checking before decoding attacker-controlled BACnetDestination elements into this buffer via bacnet_destination_decode(). When a request contains more than 10 valid elements, the 11th element is written one past the buffer boundary. This is a network-accessible remote crash vulnerability affecting BACnet protocol implementations in embedded systems.

Affected products

BACnet Stack BACnet Stack prior to 1.4.4, 1.5.1, and 1.6.0

Timeline

2026-11-12: disclosed
2026-05-18: patched

References

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