CVE-2026-47258: Input Validation Flaw (CVSS 8.2)

Description

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, a stack-based out-of-bounds write exists in the Notification Class object implementation when handling AddListElement for the recipient-list property. This issue has been patched in versions 1.4.4, 1.5.1, and 1.6.0.

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CVSS v3.1 Score

8.2

HIGH

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

Weakness Type (CWE)

CWE-20 Improper Input Validation

CWE-121 CWE-121

CWE-129 CWE-129

CWE-787 Out-of-bounds Write

References

Other References

https://github.com/bacnet-stack/bacnet-stack/pull/1353 https://github.com/bacnet-stack/bacnet-stack/security/advisories/GHSA-rjmv-3mcm-r83j

Frequently Asked Questions

What is CVE-2026-47258? +

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, a stack-based out-of-bounds write exists in the Notification Class object implementation when handling AddListElement for the recipient-list property. This issue has been patched in versions 1.4.4, 1.5.1, and 1.6.0. It has a CVSS v3.1 base score of 8.2 (HIGH).

How severe is CVE-2026-47258? +

CVE-2026-47258 has a CVSS v3.1 score of 8.2 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-2026-47258? +

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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