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CVE-2026-18681: IBM Server Firmware FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 through

30
Routine
MEDIUM 6.8UPGRADEUPGRADEUPGRADE

CVE-2026-18681 is a medium-severity flaw (CVSS 6.8) affecting power system s922 \(9009-22g\) firmware, power system h922 \(9223-22s\) firmware, power system s914 \(9009-41g\) firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

IBM Server Firmware FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 through FW950.H2 is affected by a vulnerability in the FSP firmware update process. An attacker with authenticated administrator-level access to the FSP can, under specific conditions, execute arbitrary code, resulting in a confidentiality, integrity, and availability impact.

Why this priority

  • No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score6.8 (Medium)
Attack vectorAdjacent network
Attack complexityLow
Privileges neededHigh
User interactionNone
EPSS exploit chance0.3% (top 73%)
CISA exploited listNo
WeaknessCWE-121
Published2026-08-19
Last modified2026-08-25
Publisher (CNA): IBM Corporation · Vendor: ibm

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Last updated 2026-08-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

ibm power system s922 \(9009-22g\) firmware UPGRADE
Affected: >= fw950.00 and < fw950.h3
Fixed in: fw950.h3
Safe to downgrade to: a release before fw950.00
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.
ibm power system h922 \(9223-22s\) firmware UPGRADE
Affected: >= fw950.00 and < fw950.h3
Fixed in: fw950.h3
Safe to downgrade to: a release before fw950.00
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.
ibm power system s914 \(9009-41g\) firmware UPGRADE
Affected: >= fw950.00 and < fw950.h3
Fixed in: fw950.h3
Safe to downgrade to: a release before fw950.00
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.
ibm power system s924 \(9009-42g\) firmware UPGRADE
Affected: >= fw950.00 and < fw950.h3
Fixed in: fw950.h3
Safe to downgrade to: a release before fw950.00
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.
ibm power system h924 \(9223-42s\) firmware UPGRADE
Affected: >= fw950.00 and < fw950.h3
Fixed in: fw950.h3
Safe to downgrade to: a release before fw950.00
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.
ibm power system e950 \(9040-mr9\) firmware UPGRADE
Affected: >= fw950.00 and < fw950.h3
Fixed in: fw950.h3
Safe to downgrade to: a release before fw950.00
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 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-2026-18681?

power system s922 \(9009-22g\) firmware: upgrade to fw950.h3; power system h922 \(9223-22s\) firmware: upgrade to fw950.h3; power system s914 \(9009-41g\) firmware: upgrade to fw950.h3. Exact commands for each OS are on this page.

Is CVE-2026-18681 being exploited?

CVE-2026-18681 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-2026-18681 affect?

CVE-2026-18681 affects power system s922 \(9009-22g\) firmware, power system h922 \(9223-22s\) firmware, power system s914 \(9009-41g\) firmware. Severity is medium (CVSS 6.8). IBM Server Firmware FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 through FW950.H2 is affected by a vulnerability in the FSP firmware update process. An attacker with authenticated administrator-level acc

How urgent is CVE-2026-18681?

Priority 30/100. No elevated risk signals yet.

Related CVEs

References

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