What is CVE-2026-26264?

CVE-2026-26264 is a high-severity vulnerability in Bacnet-stack, classified under Out-of-bounds Read. CVSS score: 8.1/10. Published 2026-02-13.

How severe is CVE-2026-26264?

High severity. CVSS v3 base score is 8.1 out of 10.

Out-of-bounds Read in Bacnet-stack

CVE-2026-26264

BACnet Stack is a BACnet open source protocol stack C library for embedded systems. Prior to 1.5.0rc4 and 1.4.3rc2, a malformed WriteProperty request can trigger a length underflow in the BACnet stack, leading to an out‑of‑bounds read and…

Vulnerability class: Buffer Overflow

EPSS: 0.004 (29.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H.

Affected products

Bacnet-stack — versions >= 1.5.0rc1, < 1.5.0rc4, < 1.4.3rc2
Bacnetstack Bacnet_stack — versions 1.4.3, 1.5.0

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)

Frequently asked questions

What is CVE-2026-26264?: CVE-2026-26264 is a high-severity vulnerability in Bacnet-stack, classified under Out-of-bounds Read. CVSS score: 8.1/10. Published 2026-02-13.
How severe is CVE-2026-26264?: High severity. CVSS v3 base score is 8.1 out of 10.