Cyber Resilience

CVE-2026-26366

Jung-Group Enet Smart Home 2.2.1 … 2.3.1

Public PoC
Published
15 February 2026
Modified
26 February 2026
CVSS Score v4 9.3
Click a component to see what it means
Raw vectorCVSS:4.0/AV:N/AC:L/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:X
EPSS Score 0.0065 48th percentile
Risk Priority 46 floored blend · peak EPSS

Summary

CVE-2026-26366 is a critical-severity Use of Default Credentials (CWE-1392) vulnerability in Jung-Group Enet Smart Home. Its CVSS base score is 9.3 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Default Accounts (T1078.001); ranked at the 48th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

The strongest mitigations our analysis identified map to CM-6 (Configuration Settings) and IA-5 (Authenticator Management) — see the control section below for these in your framework.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

CVE-2026-26366 affects the eNet SMART HOME server in versions 2.2.1 and 2.3.1, which ship with default credentials (user:user and admin:admin) that remain active post-installation and commissioning without requiring a mandatory password change. This vulnerability, classified under CWE-1392 (Use of Default Credentials), enables unauthenticated access to administrative functions for sensitive smart home configuration and control. It carries a CVSS v3.1 base score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H), indicating critical severity due to its network accessibility and high impact on confidentiality, integrity, and availability.

Unauthenticated attackers with network access to the eNet SMART HOME server can exploit this issue by simply using the default credentials to log in and gain full administrative privileges. Successful exploitation allows control over smart home devices, configuration settings, and potentially connected IoT endpoints, enabling unauthorized surveillance, device manipulation, or disruption of home automation services without requiring privileges, user interaction, or complex preconditions.

Mitigation details are outlined in advisories from VulnCheck (https://www.vulncheck.com/advisories/jung-enet-smart-home-server-use-of-default-credent) and Zero Science (https://www.zeroscience.mk/en/vulnerabilities/ZSL-2026-5972.php), published around the CVE disclosure on 2026-02-15. Security practitioners should review these for vendor-recommended remediation steps, such as immediate credential changes and configuration hardening.

OWASP Top 10 for Web (2025)

A07:2025 Authentication Failures

EU & UK References

Vulnerability Data

eNet SMART HOME server 2.2.1 and 2.3.1 ships with default credentials (user:user, admin:admin) that remain active after installation and commissioning without enforcing a mandatory password change. Unauthenticated attackers can use these default credentials to gain administrative access to sensitive smart…

more

home configuration and control functions.

CWE(s)
CWE-1392

Related Threats

MITRE ATT&CK Enterprise Techniques

T1078.001 Default Accounts Stealth
Adversaries may obtain and abuse credentials of a default account as a means of gaining Initial Access, Persistence, Privilege Escalation, or Defense Evasion.
attack.mitre.org →
T1078 Valid Accounts Stealth
Adversaries may obtain and abuse credentials of existing accounts as a means of gaining Initial Access, Persistence, Privilege Escalation, or Defense Evasion.
attack.mitre.org →
T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1021 Remote Services Lateral Movement
Adversaries may use [Valid Accounts](https://attack.
attack.mitre.org →
T1133 External Remote Services Persistence
Adversaries may leverage external-facing remote services to initially access and/or persist within a network.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2026-26367Same product: Jung-Group Enet Smart Home
CVE-2026-26368Same product: Jung-Group Enet Smart Home
CVE-2026-26369Same product: Jung-Group Enet Smart Home
CVE-2025-10542Shared CWE-1392
CVE-2024-28093Shared CWE-1392
CVE-2025-2119Shared CWE-1392
CVE-2026-58466Shared CWE-1392
CVE-2025-30139Shared CWE-1392
CVE-2025-22460Shared CWE-1392
CVE-2024-5632Shared CWE-1392

Affected Assets

jung-group
enet smart home
2.2.1, 2.3.1

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V13.2.1

Mitigating Controls (NIST 800-53 r5) AI

CM-6 Configuration Settings good match

Secure configuration settings establish baselines that prohibit default credentials on system components.

IA-5 Authenticator Management good match

Authenticator management requires verification of identity and secure distribution of initial authenticators, directly stopping default credentials from being left in place.

RA-5 Vulnerability Monitoring and Scanning good match

Vulnerability scanning can discover default credentials after deployment but does not stop their introduction.

AC-2 Account Management partial match

Account management processes include assignment and control of initial account credentials, reducing the chance defaults remain active.

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.

PR.PS-01 full match
prevents

Hardened baselines and configuration management explicitly prohibit default credentials on deployed systems.

PR.AA-01 mostly match
prevents

Credential management processes directly require replacing or disabling default passwords and keys.

PR.AA-03 partial match
prevents

Authentication policies can enforce non-default credential strength but do not explicitly address initial deployment defaults.

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.

A.8.9 Configuration management mostly match
prevents

The requirement to replace vendor default authentication information immediately after installation directly counters the use of default credentials that attackers commonly target.

References