COBS Frame Decoding Vulnerability in BACnet Stack Library
CVE-2026-82414

8.8HIGH

Key Information:

Vendor

Bacnet-stack

Status
Bacnet-stack
Vendor
CVE Published:
13 November 2026

What is CVE-2026-82414?

The BACnet Stack library contains a buffer overflow vulnerability in the processing of COBS frames. This issue arises when the library decodes incoming COBS payloads into a fixed input buffer, miscalculating the buffer size and allowing data to be written beyond its allocated space. This flaw is present in versions 1.4.0 through 1.4.5, 1.5.0, and 1.6.0 prior to 1.6.1. Users are strongly advised to upgrade to patched versions 1.4.6, 1.5.1, 1.6.1, or 1.7.0 to mitigate the risks associated with this vulnerability.

Affected Version(s)

bacnet-stack >= 1.4.0, < 1.4.6 < 1.4.0, 1.4.6

bacnet-stack >= 1.5.0, < 1.5.1 < 1.5.0, 1.5.1

bacnet-stack >= 1.6.0, < 1.6.1 < 1.6.0, 1.6.1

References

https://github.com/bacnet-stack/bacnet-stack/security/adv...
x_refsource_CONFIRM
https://github.com/bacnet-stack/bacnet-stack/pull/1425
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CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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