CVE-2026-18870

This Power System update is being released to address

MEDIUM
4.3
CVSS Score
Published: September 24, 2026 at 02:15 PM UTC
Updated: September 30, 2026 at 04:00 PM UTC
53 products affected across 1 vendorPowerVM HypervisorPower System E1080 (9080-hex ) FirmwarePower System E1180 (9080-heu ) Firmware

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Severity
MEDIUM4.3
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

IBM PowerVM Hypervisor FW1120.00 through FW1120.01, FW1110.00 through FW1110.31, FW1060.00 through FW1060.81, and FW950.00 through FW950.H3 could allow a remote attacker to obtain sensitive information due to an out-of-bounds read.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

fw1060.00 ≤ v < fw1060.82
Affected range stops below fw1060.82, so it looks safe — our inference, not a vendor statement
ibm-power-system-e1050-9043-mrx (same device)
fw1060.00 ≤ v < fw1060.82
Affected range stops below fw1060.82, so it looks safe — our inference, not a vendor statement
ibm-power-system-e1080-9080-hex (same device)
fw1110.00 ≤ v < fw1110.32fw1120.00 ≤ v < fw1120.02
Affected range stops below fw1110.32, so it looks safe — our inference, not a vendor statement
Affected range stops below fw1120.02, so it looks safe — our inference, not a vendor statement
ibm-power-system-e1150-9043-mru (same device)
fw1110.00 ≤ v < fw1110.32fw1120.00 ≤ v < fw1120.02
Affected range stops below fw1110.32, so it looks safe — our inference, not a vendor statement
Affected range stops below fw1120.02, so it looks safe — our inference, not a vendor statement
ibm-power-system-e1180-9080-heu (same device)
fw950.00 ≤ v < fw950.h4
Affected range stops below fw950.h4, so it looks safe — our inference, not a vendor statement
ibm-power-system-e950-9040-mr9 (same device)
fw950.00 ≤ v < fw950.h4
Affected range stops below fw950.h4, so it looks safe — our inference, not a vendor statement
ibm-power-system-e980-9080-m9s (same device)
fw950.00 ≤ v < fw950.h4
Affected range stops below fw950.h4, so it looks safe — our inference, not a vendor statement
ibm-power-system-h922-9223-22s (same device)
fw950.00 ≤ v < fw950.h4
Affected range stops below fw950.h4, so it looks safe — our inference, not a vendor statement
ibm-power-system-h924-9223-42s (same device)
fw1060.00 ≤ v < fw1060.82
Affected range stops below fw1060.82, so it looks safe — our inference, not a vendor statement
ibm-power-system-l1022-9786-22h (same device)
fw1060.00 ≤ v < fw1060.82
Affected range stops below fw1060.82, so it looks safe — our inference, not a vendor statement
ibm-power-system-l1024-9786-42h (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (1)

Vendor AdvisoryPatch
Source: cverecord
https://www.ibm.com/support/pages/node/7289135

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.3MEDIUMibm
Attack Vector
ADJACENT_NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-125

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