Is CVE-2026-52786 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-52786 being exploited in the wild.

How severe is CVE-2026-52786?

High severity, with a CVSS score of 7.1, published 12 November 2026.

Which products and versions are affected?

BACnet Stack before 1.4.5, 1.5.1, and 1.6.0.

Is there a fix for CVE-2026-52786?

Yes: fixed in 1.4.5, 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-2026-52786 attacked?

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

Am I affected by CVE-2026-52786?

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-2026-52786: BACnet Stack buffer overflow in EPICS app

CVE-2026-52786 · Severity: high · CVSS 7.1 · Published 2026-11-12

BACnet Stack is an open-source protocol library used in building automation and industrial control systems. The official EPICS client tool contains a buffer overflow vulnerability that allows a malicious network endpoint to crash the application or potentially execute arbitrary code by sending a crafted BACnet response message.

Technologies: BACnet Stack. Vendors: BACnet Stack.

Quick answers

Is CVE-2026-52786 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-52786 being exploited in the wild.
How severe is CVE-2026-52786?: High severity, with a CVSS score of 7.1, published 12 November 2026.
Which products and versions are affected?: BACnet Stack before 1.4.5, 1.5.1, and 1.6.0.
Is there a fix for CVE-2026-52786?: Yes: fixed in 1.4.5, 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-2026-52786 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-52786?: 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: 1.4.5, 1.5.1, 1.6.0

Technical details

The vulnerability is a global buffer overflow in apps/epics/main.c's ProcessRPMData() function. When processing a ReadPropertyMultiple-ACK response, the application uses an unbounded linear index to write property values into a fixed-size array without validating the remote response count against local storage capacity. The attack requires network connectivity to the EPICS tool and no authentication.

Affected products

BACnet Stack BACnet Stack before 1.4.5, 1.5.1, and 1.6.0

Timeline

2026-11-12: disclosed
2026-05-29: patched: Fix merged in PR #1366

References

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