How severe is CVE-2025-6519?

CVE-2025-6519 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-6519 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-6519?

CVE-2025-6519 affects Copeland E3 Supervisory Controller Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-6519?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2025-6519 have an EU (EUVD) identifier?

Yes. CVE-2025-6519 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-28745.

When was CVE-2025-6519 published?

CVE-2025-6519 was published on 2025-09-02 and last updated on 2026-06-17.

CVE-2025-6519

CVE-2025-6519 is a critical-severity vulnerability in Copeland E3 Supervisory Controller Firmware with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-522.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v4: 9.3
EPSS exploit prediction: 1% (39th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-28745
Weakness: CWE-522
Affected product: Copeland E3 Supervisory Controller Firmware
Published: 2025-09-02
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2025-6519?: 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.
How severe is CVE-2025-6519?: CVE-2025-6519 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-6519 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-6519?: CVE-2025-6519 affects Copeland E3 Supervisory Controller Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-6519?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-6519 have an EU (EUVD) identifier?: Yes. CVE-2025-6519 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-28745.
When was CVE-2025-6519 published?: CVE-2025-6519 was published on 2025-09-02 and last updated on 2026-06-17.

References

https://www.armis.com/research/frostbyte10/

Affected products (1)

cpe:2.3:o:copeland:e3_supervisory_controller_firmware:*:*:*:*:*:*:*:*

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