Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC PR UI S C I A CVSS EPSS %ile KEV A L H N C H N N 6.2 .0010 1.0 —
AFFECTED Product Versions Fixed PowerVM Hypervisor FW1110.00 – —
TIMELINE Mar 26 Reserved by ibm Aug 19 Published (CNA: ibm) Aug 25 RESCORED — CVE-2026-4936 (IBM PowerVM Hypervisor). CVSS 5.1 → 6.2 (NVD).
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.
| Date | Event | Detail |
|---|---|---|
| March 26, 2026 | Reserved | Reserved by ibm |
| August 19, 2026 | Published | Published (CNA: ibm) |
| August 25, 2026 | RESCORED | RESCORED — CVE-2026-4936 (IBM PowerVM Hypervisor). CVSS 5.1 → 6.2 (NVD). |
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|---|---|---|---|
| IBM | PowerVM Hypervisor | — | FW1110.00 | — |
Authoritative record: CVE-2026-4936 at cve.org
Vendors: ibm
Weaknesses: CWE-331
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-4936 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
