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CVE-2026-82928— Undocumented access path in mH-DEVELOPER

Quick assessment

Affected
F&F Filipowski mH-DEVELOPER
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

mH-DEVELOPER 智能家居模块在 文件中硬编码了一个 SSH 公钥，该公钥可能构成潜在的后门。SSH 守护进程允许通过密钥认证以 root 用户登录，并且该服务会自动启动。拥有对应私钥的攻击者可以在任何受影响的设备上获取 root shell，从而导致系统完全被入侵。除非重新挂载文件系统，否则无法删除该公钥，且该公钥在恢复出厂设置后仍然存在。厂商指出，此功能仅用于维护目的。 该问题已在版本 3.0.30 中修复。

CVSS 7.7 · High
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I. Basic Information for CVE-2026-82928

Vulnerability Information
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Vulnerability Title
Undocumented access path in mH-DEVELOPER
Source: CVE Program / CVE List V5
Vulnerability Description
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 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
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1242
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
F&F Filipowski mH-DEVELOPER 0 ~ 3.0.30 -

II. Public POCs for CVE-2026-82928

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-82928

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Security Blog Posts for CVE-2026-82928 (1)

Other References for CVE-2026-82928 (1)

Same Patch Batch · F&F Filipowski · 2026-09-28 · 7 CVEs total

CVE-2026-82935 6.9 MEDIUM Use of End-of-Life components in mH-DEVELOPER
CVE-2026-82930 6.4 MEDIUM Missing Authentication in mH-DEVELOPER
CVE-2026-82929 6.3 MEDIUM Use of Shared Cryptographic Key in mH-DEVELOPER
CVE-2026-82933 6.0 MEDIUM Cleartext Transmission of Sensitive Information in mH-DEVELOPER
CVE-2026-82936 5.9 MEDIUM Denial of Service in mH-DEVELOPER
CVE-2026-82932 5.3 MEDIUM Missing Firewall Configuration in mH-DEVELOPER

IV. Related Vulnerabilities

Same product: mH-DEVELOPER
Same vendor: F&F Filipowski
Same weakness: CWE-1242

V. Comments for CVE-2026-82928

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