Vulnerability in Bosch Sensortec BHI360 SensorAPI (CVE-2026-42804)
Summary
Vulnerability in Bosch Sensortec BHI360 SensorAPI (CVE-2026-42804). Successful exploitation can lead to full system takeover.
Original description
The description as published by the source.
A stack-based buffer overflow vulnerability exists in the Bosch Sensortec BHI360 SensorAPI(C-Library) in versions up to and including commit d6b200416a.
The vulnerability is located within the FIFO parsing and debug logging subsystem inside the function bhi360_parse_debug_message() in bhi360_parse.c (lines 1852-1875).
The parser trusts the first payload byte of a debug frame as the message length (msg_length) and copies that many bytes into a fixed-size 17-byte stack buffer (debug_msg) via memcpy without performing any bounds checking.
A locally or physically positioned attacker (e.g., via a malicious sensor, counterfeit hardware module, or a Man-in-the-Middle on the communication bus) can exploit this vulnerability by injecting a crafted debug frame with a length byte exceeding 16.
This corrupts adjacent stack data, including the saved return address.
Furthermore, because the overflowed buffer is subsequently passed to a printf-style logging sink, the attacker can supply format string specifiers (e.g., %n) to execute arbitrary code on the host microcontroller/SoC or cause a reliable system crash (Denial of Service).
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-42804 has been found in Bosch Sensortec BHI360 SensorAPI.
Successful exploitation can lead to full system takeover. CVSS score: 7.6/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Bosch Sensortec BHI360 SensorAPI CVE-2026-42804" on the vendor's site.
CVE-2026-42804 (Bosch Sensortec BHI360 SensorAPI) — CWE-121 / CVSS v3 7.6
Attack vector: physical / unauthenticated / no user interaction
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-121) exists in Bosch Sensortec BHI360 SensorAPI.
Check the vendor advisory for the affected versions of Bosch Sensortec BHI360 SensorAPI.
Severity: High (CVSS 7.6/10). Successful exploitation can lead to full system takeover.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで Bosch Sensortec BHI360 SensorAPI を使っているサービスとバージョンを洗い出す。
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2Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
References
- web psirt.bosch.com
- web nvd.nist.gov
- web github.com