CVE-2026-82928
Raw vector
CVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XCVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.
Summary
CVE-2026-82928 is a high-severity Inclusion of Undocumented Features or Chicken Bits (CWE-1242) vulnerability in Cert (inferred from references). Its CVSS base score is 7.7 (High).
Operationally, ranked at the 7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified map to CM-7 (Least Functionality) and SA-15 (Development Process, Standards, and Tools) — see the control section below for these in your framework.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-88228
- 🇵🇱 CERT-PL: cert.pl
Vulnerability Data
mH-DEVELOPER smart home module contains a hardcoded SSH public key in /root/.ssh/authorized_keys, serving as a potential backdoor. The SSH daemon allows root login via key authentication and starts automatically. An attacker with the matching private key can gain a root…
more
shell on any affected device, resulting in full system compromise. The key cannot be removed without remounting the file system and survives a factory reset. Vendor notes that this functionality was used only for service purposes. This issue was fixed in version 3.0.30
- CWE(s)
Related Threats
CVEs Like This One
Affected Assets
Mitigating Controls
Control response
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V6.3.4
Mitigating Controls (NIST 800-53 r5) AI
Least-functionality configuration can disable or remove non-essential capabilities once discovered, limiting the blast radius of any undocumented chicken bits that remain.
Documented development standards and processes directly require that all device features be specified and recorded, preventing hidden chicken bits from being introduced.
An SDLC that incorporates security requires all features to be captured in requirements and design artifacts, stopping undocumented capabilities from being added.
Security engineering principles applied during design explicitly call for complete, documented functionality and the avoidance of hidden or undeclared mechanisms.
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.
Secure development life cycle requires documented design and review, reducing hidden or undocumented features.
Secure system architecture and engineering principles mandate documented, minimal, and auditable designs, limiting chicken bits.
Secure coding standards and peer review detect and prohibit undocumented or debug features.
Security testing in development and acceptance can uncover undocumented functionality before release.
Change management processes require documented approvals, reducing the chance of hidden features being introduced.
Configuration management enforces documented, approved configurations, limiting undocumented hardware or firmware features.