CVE-2019-6157: In various firmware versions of Lenovo System x, the integrated management module II (IMM2)'s first failure da
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MEDIUM 6.5UPGRADEUPGRADEUPGRADE
CVE-2019-6157 is a medium-severity flaw (CVSS 6.5) affecting flex system x240 m4 firmware, flex system x240 m5 firmware, flex system x280 x6 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
In various firmware versions of Lenovo System x, the integrated management module II (IMM2)'s first failure data capture (FFDC) includes the web server's private key in the generated log file for support.
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
lenovo flex system x240 m4 firmware UPGRADE
Affected: < 5.30
Fixed in: 5.30
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.
lenovo flex system x240 m5 firmware UPGRADE
Affected: < 5.30
Fixed in: 5.30
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.
lenovo flex system x280 x6 firmware UPGRADE
Affected: < 5.30
Fixed in: 5.30
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.
lenovo flex system x440 m4 firmware UPGRADE
Affected: < 5.30
Fixed in: 5.30
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.
lenovo flex system x480 x6 firmware UPGRADE
Affected: < 5.30
Fixed in: 5.30
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.
lenovo flex system x880 firmware UPGRADE
Affected: < 5.30
Fixed in: 5.30
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-2019-6157?
flex system x240 m4 firmware: upgrade to 5.30; flex system x240 m5 firmware: upgrade to 5.30; flex system x280 x6 firmware: upgrade to 5.30. Exact commands for each OS are on this page.
Is CVE-2019-6157 being exploited?
CVE-2019-6157 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-2019-6157 affect?
CVE-2019-6157 affects flex system x240 m4 firmware, flex system x240 m5 firmware, flex system x280 x6 firmware. Severity is medium (CVSS 6.5). In various firmware versions of Lenovo System x, the integrated management module II (IMM2)'s first failure data capture (FFDC) includes the web server's private key in the generated log file for support.
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