CVE-2026-18848: IBM Power Systems Firmware FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 t

Q: How do I fix CVE-2026-18848?

power system e1080 \(9080-hex\) firmware: upgrade to fw1060.81; power system e1180 \(9080-heu\) firmware: upgrade to fw1110.31; power system s922 \(9009-22g\) firmware: upgrade to fw950.h3. Exact commands for each OS are on this page.

Q: Is CVE-2026-18848 being exploited?

CVE-2026-18848 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-2026-18848 affect?

CVE-2026-18848 affects power system e1080 \(9080-hex\) firmware, power system e1180 \(9080-heu\) firmware, power system s922 \(9009-22g\) firmware. Severity is high (CVSS 8.3). IBM Power Systems 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 ASMI web interface. An attacker who can lure a logged-in ASMI administrator

Routine

HIGH 8.3UPGRADEUPGRADEUPGRADE

CVE-2026-18848 is a high-severity flaw (CVSS 8.3) affecting power system e1080 \(9080-hex\) firmware, power system e1180 \(9080-heu\) firmware, power system s922 \(9009-22g\) firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

IBM Power Systems 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 ASMI web interface. An attacker who can lure a logged-in ASMI administrator to visit a crafted web page can, under specific conditions, silently perform administrative actions on the FSP on behalf of that administrator, resulting in a confidentiality, integrity, and availability impact

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.3 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 96%)
CISA exploited list	No
Weakness	CWE-352
Published	2026-08-19
Last modified	2026-08-25

Publisher (CNA): IBM Corporation · Vendor: ibm

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

Am I affected?

Timeline

2026-08-19 19:17 UTCPublished CVE record published
2026-08-25 19:49 UTCUpdated Record last modified

ibm power system e1080 \(9080-hex\) firmware UPGRADE

Affected: >= fw1060.00 and < fw1060.81

Fixed in: fw1060.81

Safe to downgrade to: a release before fw1060.00

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 e1180 \(9080-heu\) firmware UPGRADE

Affected: >= fw1110.00 and < fw1110.31 · fw1120.00

Fixed in: fw1110.31

Safe to downgrade to: a release before fw1110.00

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 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.

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-2026-18848?

power system e1080 \(9080-hex\) firmware: upgrade to fw1060.81; power system e1180 \(9080-heu\) firmware: upgrade to fw1110.31; power system s922 \(9009-22g\) firmware: upgrade to fw950.h3. Exact commands for each OS are on this page.

Is CVE-2026-18848 being exploited?

CVE-2026-18848 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-2026-18848 affect?

CVE-2026-18848 affects power system e1080 \(9080-hex\) firmware, power system e1180 \(9080-heu\) firmware, power system s922 \(9009-22g\) firmware. Severity is high (CVSS 8.3). IBM Power Systems 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 ASMI web interface. An attacker who can lure a logged-in ASMI administrator

How urgent is CVE-2026-18848?

Priority 30/100. High severity

Related CVEs

CVE-2026-93306 HIGH 7.1 UPGRADE UPGRADE IBM Server Firmware FW1120.00 through FW1120.01, FW1110.00 through FW1110.31, FW1060.00 through FW1060.81, and
CVE-2026-16828 HIGH 7.6 UPGRADE UPGRADE IBM Power Systems Firmware FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 t
CVE-2026-16832 HIGH 8.4 UPGRADE UPGRADE IBM Power Systems Firmware FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 t
CVE-2026-16835 CRITICAL 9.6 UPGRADE UPGRADE IBM Power Systems Firmware FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 t
CVE-2026-16938 MEDIUM 6.9 UPGRADE UPGRADE IBM Power Systems Firmware FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 t

References

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