CVE-2019-19228: Fronius Solar Inverter devices before 3.14.1 (HM 1.12.1) allow attackers to bypass authentication because the
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CRITICAL 9.8REMOTEUPGRADEUPGRADEUPGRADE
CVE-2019-19228 is a critical-severity flaw (CVSS 9.8) affecting datamanager box 2.0 firmware, eco 25.0-3-s firmware, eco 27.0-3-s firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Fronius Solar Inverter devices before 3.14.1 (HM 1.12.1) allow attackers to bypass authentication because the password for the today account is stored in the /tmp/web_users.conf file.
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
Published CVE record published
Updated Record last modified
fronius datamanager box 2.0 firmware UPGRADE
Affected: < 3.14.1
Fixed in: 3.14.1
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.
fronius eco 25.0-3-s firmware UPGRADE
Affected: < 3.14.1
Fixed in: 3.14.1
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.
fronius eco 27.0-3-s firmware UPGRADE
Affected: < 3.14.1
Fixed in: 3.14.1
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.
fronius galvo 1.5-1 firmware UPGRADE
Affected: < 3.14.1
Fixed in: 3.14.1
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.
fronius galvo 1.5-1 208-240 firmware UPGRADE
Affected: < 3.14.1
Fixed in: 3.14.1
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.
fronius galvo 2.0-1 firmware UPGRADE
Affected: < 3.14.1
Fixed in: 3.14.1
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.
Verify at the official sourceNVD · 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-2019-19228?
datamanager box 2.0 firmware: upgrade to 3.14.1; eco 25.0-3-s firmware: upgrade to 3.14.1; eco 27.0-3-s firmware: upgrade to 3.14.1. Exact commands for each OS are on this page.
Is CVE-2019-19228 being exploited?
CVE-2019-19228 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-2019-19228 affect?
CVE-2019-19228 affects datamanager box 2.0 firmware, eco 25.0-3-s firmware, eco 27.0-3-s firmware. Severity is critical (CVSS 9.8). Fronius Solar Inverter devices before 3.14.1 (HM 1.12.1) allow attackers to bypass authentication because the password for the today account is stored in the /tmp/web_users.conf file.
How urgent is CVE-2019-19228?
Priority 64/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action
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