Off-by-one Error Affecting bacnet-stack package, versions [0,]
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-CONAN-BACNETSTACK-15282808
- published15 Feb 2026
- disclosed13 Feb 2026
- creditFinder16
Introduced: 13 Feb 2026
NewCVE-2026-21870 (opens in a new tab)How to fix?
A fix was pushed into the master branch but not yet published.
Overview
bacnet-stack is a None
Affected versions of this package are vulnerable to Off-by-one Error.
via the tokenizer_string function. An attacker can cause a crash by providing a string literal longer than the buffer limit, which leads to a stack overflow when the function incorrectly writes a null byte outside the allocated buffer.