CVE-2026-82414
BACnet Stack: MS/TP COBS decode overflow
CVSS Score
8.8
EPSS Score
0.0%
EPSS Percentile
0th
BACnet Stack is a BACnet open source protocol stack C library for embedded systems. From versions 1.4.0 to before 1.4.6, 1.5.0 to before 1.5.1, and 1.6.0 to before 1.6.1, the BACnet MS/TP receive path decodes COBS frames into an output pointer inside the same fixed input buffer, but passes the full input-buffer size as the decode capacity. A long valid COBS payload can therefore write past the end of the actual remaining buffer. This issue has been patched in versions 1.4.6, 1.5.1, 1.6.1, and 1.7.0.
| CWE | CWE-787 |
| 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:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
bacnet-stack / bacnet-stack
>= 1.4.0, < 1.4.6 >= 1.5.0, < 1.5.1 >= 1.6.0, < 1.6.1