Which versions of E3 Supervisory Controller Firmware are affected by CVE-2025-6519?

CVE-2025-6519 presents critical security risk rated CVSS 9.3. Successful exploitation could critically impact the confidentiality, integrity, and availability of affected systems.

How to fix or mitigate CVE-2025-6519?

Within 24 hours: Identify all affected systems and apply vendor patches immediately. Monitor vendor channels for patch availability.

E3 Supervisory Controller Firmware CVE-2025-6519

Q: What is the CVSS score of CVE-2025-6519?

CVE-2025-6519 has a CVSS 4.0 base score of 9.3 (Critical). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:L/SA:L/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 exploitation probability: 0.1%.

CRITICAL

Insufficiently Protected Credentials (CWE-522)

2025-09-02 dd59f033-460c-4b88-a075-d4d3fedb6191

Information Disclosure E3 Supervisory Controller Firmware

9.3

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

9.3 CRITICAL

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:L/SA:L/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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:L/SA:L/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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:10 vuln.today

CVE Published

Sep 02, 2025 - 12:15 nvd

CRITICAL 9.3

DescriptionCVE.org

E3 Site Supervisor (firmware version < 2.31F01) has a default admin user "ONEDAY" with a daily generated password. An attacker can predictably generate the password for ONEDAY. The oneday user cannot be deleted or modified by any user.

AnalysisAI

E3 Site Supervisor (firmware version < 2.31F01) has a default admin user "ONEDAY" with a daily generated password. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Technical ContextAI

This vulnerability is classified as Insufficiently Protected Credentials (CWE-522), which allows attackers to obtain user credentials due to weak protection mechanisms. E3 Site Supervisor (firmware version < 2.31F01) has a default admin user "ONEDAY" with a daily generated password. An attacker can predictably generate the password for ONEDAY. The oneday user cannot be deleted or modified by any user. Affected products include: Copeland E3 Supervisory Controller Firmware.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Hash passwords with strong algorithms (bcrypt, argon2), encrypt credentials in transit and at rest, never log credentials.