CVE-2026-47257 (CVSS 8.1)

Description

BACnet Stack is a BACnet open source protocol stack C library for embedded systems. In versions 1.5.0 and 1.6.0-rc1, there is a restore logic flaw in bacnet-stack that is reachable through the official, unmodified apps/server management path when BACNET_BACKUP_RESTORE is enabled. This issue has been patched in versions 1.5.1 and 1.6.0.

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CVSS v3.1 Score

8.1

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Weakness Type (CWE)

CWE-670 CWE-670

CWE-754 CWE-754

References

Other References

https://github.com/bacnet-stack/bacnet-stack/pull/1352 https://github.com/bacnet-stack/bacnet-stack/security/advisories/GHSA-x6pp-3pf3-f87r https://github.com/bacnet-stack/bacnet-stack/security/advisories/GHSA-x6pp-3pf3-f87r

Frequently Asked Questions

What is CVE-2026-47257? +

BACnet Stack is a BACnet open source protocol stack C library for embedded systems. In versions 1.5.0 and 1.6.0-rc1, there is a restore logic flaw in bacnet-stack that is reachable through the official, unmodified apps/server management path when BACNET_BACKUP_RESTORE is enabled. This issue has been patched in versions 1.5.1 and 1.6.0. It has a CVSS v3.1 base score of 8.1 (HIGH).

How severe is CVE-2026-47257? +

CVE-2026-47257 has a CVSS v3.1 score of 8.1 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

How do I check if I'm vulnerable to CVE-2026-47257? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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