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PatchSiren cyber security CVE debrief

CVE-2026-38570 bacnet-stack CVE debrief

CVE-2026-38570 is a HIGH-severity vulnerability in the bacnet_stack 1.3.1 library. The vulnerability is caused by an Out-of-bounds Read in the `bacnet_tag_number_decode` function, which can be exploited by attackers to cause a denial of service. The vulnerability has a CVSS score of 7.5 and was published on [cvePublishedAt](https://www.cve.org/CVERecord?id=CVE-2026-38570).

Vendor
bacnet-stack
Product
bacnet_stack
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-04
Original CVE updated
2026-07-22
Advisory published
2026-06-04
Advisory updated
2026-07-22

Who should care

Users of bacnet_stack 1.3.1 library should be aware of this vulnerability and take steps to mitigate it.

Technical summary

The vulnerability is caused by an Out-of-bounds Read in the `bacnet_tag_number_decode` function. This can be exploited by attackers to cause a denial of service.

Defensive priority

HIGH

Recommended defensive actions

  • Update to a patched version of bacnet_stack library, if available.
  • Implement input validation and bounds checking to prevent exploitation.

Evidence notes

The vulnerability was reported in the National Vulnerability Database (NVD) and has a CVE record [cve-org](https://www.cve.org/CVERecord?id=CVE-2026-38570).

Sources and references

Verified primary and authoritative sources

  • CVE-2026-38570 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-38570

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-38570 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-38570

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.