CVE-2025-6519: E3 Site Supervisor (firmware version < 2.31F01) has a default admin user "ONEDAY" with a daily generated passw

Q: How do I fix CVE-2025-6519?

e3 supervisory controller firmware: upgrade to 2.31f01. Exact commands for each OS are on this page.

Q: Is CVE-2025-6519 being exploited?

CVE-2025-6519 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-6519 affect?

CVE-2025-6519 affects e3 supervisory controller firmware. Severity is critical (CVSS 9.8). 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.

Q: How urgent is CVE-2025-6519?

Priority 50/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.8REMOTEUPGRADE

CVE-2025-6519 is a critical-severity flaw (CVSS 9.8) affecting e3 supervisory controller firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 55%)
CISA exploited list	No
Weakness	CWE-522
Published	2025-09-02
Last modified	2026-10-23

Publisher (CNA): Armis · Vendor: copeland

Last updated 2026-10-23 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-09-02 12:15 UTCPublished CVE record published
2026-10-23 22:10 UTCUpdated Record last modified

copeland e3 supervisory controller firmware UPGRADE

Affected: < 2.31f01

Fixed in: 2.31f01

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Exact fixes by distribution

Fedora 46 · python-streamlink · FIXED · 8.6.2-1.fc46 · FEDORA-2026-a56fcfdc08 · source

sudo dnf upgrade --advisory=FEDORA-2026-a56fcfdc08

Fedora ELN · valgrind · FIXED · 3.28.0-1.eln159 · FEDORA-2026-c593ef1d15 · source

sudo dnf upgrade --advisory=FEDORA-2026-c593ef1d15

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-6519?

e3 supervisory controller firmware: upgrade to 2.31f01. Exact commands for each OS are on this page.

Is CVE-2025-6519 being exploited?

CVE-2025-6519 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-6519 affect?

CVE-2025-6519 affects e3 supervisory controller firmware. Severity is critical (CVSS 9.8). 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 urgent is CVE-2025-6519?

Priority 50/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

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CVE-2025-52544 HIGH 7.5 UPGRADE E3 Site Supervisor Control (firmware version < 2.31F01) has a floor plan feature that allows for an unauthenti
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CVE-2025-52545 HIGH 7.5 UPGRADE E3 Site Supervisor Control (firmware version < 2.31F01) RCI service contains an API call to read users info, w

References

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