# CVE-2026-4936

## Summary

- **CVE ID:** CVE-2026-4936
- **Severity:** MEDIUM
- **CVSS Score:** 5.1 (CVSS:3.1/AV:A/AC:H/PR:H/UI:R/S:C/C:H/I:N/A:N)
- **CWE:** CWE-331
- **Published:** Aug 19, 2026
- **Last Modified:** Aug 20, 2026

## 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.

## Affected Products

- IBM — PowerVM Hypervisor (FW1110.00)
- IBM — PowerVM Hypervisor (FW1060.00)
- IBM — PowerVM Hypervisor (FW950.00)

## References

- [CNA](https://www.ibm.com/support/pages/node/7283890)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.07%
- **EPSS Percentile:** 0.1

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._