CVE-2026-64675
BACnet Stack: Pre-auth OOB read in xy_color_decode (BACnetXYColor) via WriteGroup/WriteProperty
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
BACnet Stack is a BACnet open source protocol stack C library for embedded systems. Prior to versions 1.4.5 and 1.5.1, a single unauthenticated BACnet/IP UDP datagram (port 47808) triggers an out-of-bounds read in xy_color_decode() (src/bacnet/lighting.c), reachable pre-authentication through two default-registered service handlers: the UnconfirmedRequest WriteGroup service (0x0A) and Confirmed WriteProperty on a BACnetXYColor-typed property. This issue has been patched in versions 1.4.5, 1.5.1, and 1.6.0.
| CWE | CWE-125 |
| Vendor | bacnet-stack |
| Product | bacnet-stack |
| Published | Nov 13, 2026 |
| Last Updated | Nov 13, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
Affected Versions
bacnet-stack / bacnet-stack
< 1.4.5 < 1.5.1