# CVE-2026-47711: BACnet Stack: Stack buffer overflow in Loop internal ReadProperty path via Life_Safety_Zone.accepted-modes on the default BACnet/IP server

Status: published. Published: 2026-11-12. Updated: 2026-11-12.

BACnet Stack is a BACnet open source protocol stack C library for embedded systems. Prior to versions 1.4.4, 1.5.1, and 1.6.0, the current master demo server can be crashed remotely over BACnet/IP by sending a valid Confirmed WriteProperty request that updates loop-1's controlled-variable-reference to point to life-safety-zone-1 / accepted-modes. This issue has been patched in versions 1.4.4, 1.5.1, and 1.6.0.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- bacnet-stack / bacnet-stack: < 1.4.4 (affected); < 1.5.1 (affected); < 1.6.0 (affected). Source: CNA: GitHub_M

## Severity and prioritization

- CVSS 3.1: 8.6 (high); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H; source: CNA: GitHub_M

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-121, CWE-131, CWE-787, CWE-805

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/bacnet-stack/bacnet-stack/security/advisories/GHSA-vrpm-9gm2-x552 (CNA: GitHub_M; x_refsource_CONFIRM)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-47711; retrieved 2026-11-12; source updated 2026-11-12

Revision: d6b5958102b4d6e65c97d9a444888bc9de88418fcc7a998abe45c47cb915d77e

Canonical: https://y2.dev/cve/CVE-2026-47711

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