← Vulnerability feed

Vulnerability record · CVE-2026-4936 · published 19 August 2026

CVE-2026-4936: Ibm power system s1122 \(9824-22a\) firmware vulnerability

Ibm · Power System S1122 \(9824 22a\) Firmware

IBM PowerVM Hypervisor Platform KeyStore (PKS) and virtual TPM FW1110.00 through FW1110.20, FW1060.00 through FW1060.71, and FW950.00 through FW950.H2 use persistent storage key seeds that result in an AES key with reduced strength. An attacker with access to the service processor or HMC could exploit this weakness to derive the encryption key and access the data.

6.2 CVSS 3.1 Medium EPSS 0.11% · top 99.0% CWE-331 · CWE-331
6.2CVSS 3.1 base score
0.11%EPSS exploitation probability, 30 days
NoNot in CISA KEV
26Affected product versions listed by NVD
1References
25 Aug 2026Last modified by NVD

Description

IBM PowerVM Hypervisor Platform KeyStore (PKS) and virtual TPM FW1110.00 through FW1110.20, FW1060.00 through FW1060.71, and FW950.00 through FW950.H2 use persistent storage key seeds that result in an AES key with reduced strength. An attacker with access to the service processor or HMC could exploit this weakness to derive the encryption key and access the data.

CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N

Affected products

26 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.ibm.com/support/pages/node/7283890 Vendor Advisory

Track CVE-2026-4936 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2024-45656Ibm power system e1080 \(9080-hex\) firmware hard-coded credentials vulnerabilityIBM Flexible Service Processor (FSP) FW860.00 through FW860.B3, FW950.00 through FW950.C0, FW1030.00 through FW1030.61, FW1050.00 through FW1050.21, …EPSS 0.45%9.6CVE-2026-16687Ibm power system e1180 \(9080-heu\) firmware stack-based buffer overflow vulnerabilityIBM 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 vulner…EPSS 0.35%9.6CVE-2026-16835Ibm power system e1080 \(9080-hex\) firmware improper certificate validation vulnerabilityIBM 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 vulner…EPSS 0.36%8.8CVE-2026-18821Ibm power system s1122 \(9824-22a\) firmware out-of-bounds write vulnerabilityIBM PowerVM Hypervisor FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 through FW950.H2 Power Systems Firmware is a…EPSS 0.20%8.8CVE-2026-17414Ibm power system s1122 \(9824-22a\) firmware improper input validation vulnerabilityIBM PowerVM Hypervisor FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 through FW950.H2 Power Systems Firmware is a…EPSS 0.19%8.8CVE-2026-7868Ibm power system s1122 \(9824-22a\) firmware incorrect authorization vulnerabilityIBM OPENBMC FW1110.00 through FW1110.20, and FW1060.00 through FW1060.71 allows ReadOnly users to escalate privileges and give themselves administrat…EPSS 0.37%8.4CVE-2026-17091Ibm power system s1122 \(9824-22a\) firmware integer overflow vulnerabilityIBM PowerVM Hypervisor FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 through FW950.H2 is affected by a vulnerabil…EPSS 0.15%8.4CVE-2026-16832Ibm power system e1080 \(9080-hex\) firmware stack-based buffer overflow vulnerabilityIBM 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 vulner…EPSS 0.32%

Source: NIST National Vulnerability Database (record CVE-2026-4936), CISA KEV, FIRST EPSS (scores of 2026-10-16). This page is refreshed as NVD updates the record.