What is CVE-2026-41503?

CVE-2026-41503 is a high-severity vulnerability in Bacnet-stack, classified under Out-of-bounds Read. CVSS score: 7.5/10. Published 2026-04-24.

How severe is CVE-2026-41503?

High severity. CVSS v3 base score is 7.5 out of 10.

Out-of-bounds Read in Bacnet-stack

CVE-2026-41503

BACnet Stack is a BACnet open source protocol stack C library for embedded systems. Prior to 1.4.3, an out-of-bounds read vulnerability in bacnet-stack's ReadPropertyMultiple service property decoder allows unauthenticated remote attackers…

Vulnerability class: Buffer Overflow

EPSS: 0.003 (50.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Bacnet-stack — versions >= 1.4.0, < 1.4.3
Bacnetstack Bacnet_stack — versions 1.5.0

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

https://github.com/bacnet-stack/bacnet-stack/security/advisories/GHSA-5w2v-mwqj-pr2c (x_refsource_CONFIRM, Exploit, Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2026-41503?: CVE-2026-41503 is a high-severity vulnerability in Bacnet-stack, classified under Out-of-bounds Read. CVSS score: 7.5/10. Published 2026-04-24.
How severe is CVE-2026-41503?: High severity. CVSS v3 base score is 7.5 out of 10.