CVE-2025-6519:E3 Site Supervisor firmware versions earlier than 2.31F01 include an undeletable default admin account "ONEDAY" whose daily-generated password can be predictably recreated by an attacker, allowing unauthenticated remote compromise.

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The E3 Supervisory Control (E3 Site Supervisor) firmware prior to 2.31F01 ships a built-in admin user named ONEDAY that cannot be removed or altered by normal users. The account's password is regenerated daily but follows a predictable algorithm, enabling an attacker with network access to compute the current password and gain administrative access without credentials or interaction. Successful exploitation can result in full confidentiality, integrity, and availability impact to the device and connected control systems. CVSS v4.0 rates this issue CRITICAL (base score 9.3) with network attack vector and no privileges required.

Overview

The vulnerability is an instance of insufficiently protected credentials (CWE-522) where a fixed administrative account with an algorithmically predictable daily password exposes supervisory control interfaces to trivial remote compromise. A remote attacker on the same network segment (or any segment with access to the device's ETH0 interface) can derive the ONEDAY password and obtain administrative control. The ONEDAY account cannot be deleted or modified through normal user operations, preventing mitigation by removing the account. The issue affects Copeland LP E3 Supervisory Control firmware versions older than 2.31F01 and is credited to Armis Labs.

Remediation

Upgrade affected E3 Supervisory Control firmware to a fixed release (2.31F01 or later) as provided by the vendor. If immediate upgrade is not possible, restrict access to the device management network by isolating the E3 supervisory interface (ETH0) on a trusted VLAN or subnet and block access from untrusted networks using network firewall rules. Ensure the management VLAN/subnet is never reachable from general-purpose or internet-connected networks, monitor for unexpected administrative logins, and apply firmware updates as soon as they are available.

References

Industry ExposureMost to least
This section illustrates the prevalence of a specific Common Vulnerabilities and Exposures (CVE) across various industries based on customer reports. The ranking displays industries from the most to least affected by this particular vulnerability, offering valuable insight into where this CVE has been most frequently observed. This information can help organizations within these sectors prioritize their security efforts, understand their relative risk exposure compared to their peers, and focus remediation strategies where they are most needed. By understanding the industry-specific impact, organizations can make more informed decisions regarding patching, resource allocation, and overall risk management related to this CVE.

  1. Accommodation & Food Services: Low
    Accommodation & Food Services
  2. Administrative, Support, Waste Management & Remediation Services: Low
    Administrative, Support, Waste Management & Remediation Services
  3. Agriculture, Forestry Fishing & Hunting: Low
    Agriculture, Forestry Fishing & Hunting
  4. Arts, Entertainment & Recreation: Low
    Arts, Entertainment & Recreation
  5. Construction: Low
    Construction
  6. Educational Services: Low
    Educational Services
  7. Finance and Insurance: Low
    Finance and Insurance
  8. Health Care & Social Assistance: Low
    Health Care & Social Assistance
  9. Information: Low
    Information
  10. Management of Companies & Enterprises: Low
    Management of Companies & Enterprises
  11. Manufacturing: Low
    Manufacturing
  12. Mining: Low
    Mining
  13. Other Services (except Public Administration): Low
    Other Services (except Public Administration)
  14. Professional, Scientific, & Technical Services: Low
    Professional, Scientific, & Technical Services
  15. Public Administration: Low
    Public Administration
  16. Real Estate Rental & Leasing: Low
    Real Estate Rental & Leasing
  17. Retail Trade: Low
    Retail Trade
  18. Transportation & Warehousing: Low
    Transportation & Warehousing
  19. Utilities: Low
    Utilities
  20. Wholesale Trade: Low
    Wholesale Trade

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