{"cve":"CVE-2026-4936","nvd":{"published":"2026-08-19T21:16:55.353","modified":"2026-08-25T20:36:34.443","status":"Analyzed","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_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N","score":6.2},"cwes":["CWE-331"],"references":["https://www.ibm.com/support/pages/node/7283890"],"products":["ibm:power_system_e1050_\\(9043-mrx\\)_firmware","ibm:power_system_e1080_\\(9080-hex\\)_firmware","ibm:power_system_e1150_\\(9043-mru\\)_firmware","ibm:power_system_e1180_\\(9080-heu\\)_firmware","ibm:power_system_e950_\\(9040-mr9\\)_firmware","ibm:power_system_e980_\\(9080-m9s\\)_firmware","ibm:power_system_h922_\\(9223-22s\\)_firmware","ibm:power_system_h924_\\(9223-42s\\)_firmware","ibm:power_system_l1022_\\(9786-22h\\)_firmware","ibm:power_system_l1024_\\(9786-42h\\)_firmware","ibm:power_system_l1122_\\(9856-22h\\)_firmware","ibm:power_system_l1124_\\(9856-42h\\)_firmware","ibm:power_system_s1012_\\(9028-21b\\)_firmware","ibm:power_system_s1014_\\(9105-41b\\)_firmware","ibm:power_system_s1022_\\(9105-22a\\)_firmware","ibm:power_system_s1022s_\\(9105-22b\\)_firmware","ibm:power_system_s1024_\\(9105-42a\\)_firmware","ibm:power_system_s1112_\\(9242-21b\\)_firmware","ibm:power_system_s1112_\\(9242-21t\\)_firmware","ibm:power_system_s1114_\\(9824-41b\\)_firmware","ibm:power_system_s1122_\\(9824-22a\\)_firmware","ibm:power_system_s1122s_\\(9824-22b\\)_firmware","ibm:power_system_s1124_\\(9824-42a\\)_firmware","ibm:power_system_s914_\\(9009-41g\\)_firmware","ibm:power_system_s922_\\(9009-22g\\)_firmware","ibm:power_system_s924_\\(9009-42g\\)_firmware"],"source":"nvd","synced_at":"2026-10-19T22:49:38.260478770+00:00"},"epss":{"cve":"CVE-2026-4936","score":0.00105,"percentile":0.01031,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}