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.

CVE-2026-4937

CVE-2026-4937MEDIUM

IBM PowerVM Hypervisor — Power System Insufficient Entropy

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   L   L   H   N  C  H  N  N    6.0   .0013    2.3     —

AFFECTED
  Product             Versions     Fixed
  PowerVM Hypervisor  FW1110.00 –  —

TIMELINE
  Mar 26  Reserved by ibm
  Aug 19  Published (CNA: ibm)
  Aug 25  RESCORED — CVE-2026-4937 (IBM PowerVM Hypervisor). CVSS 5.3 → 6 (NVD).

CWE-331 · CNA: ibm · CVSS v3.1 · 1 reference · NVD status: Analyzed

Description

IBM PowerVM Hypervisor FW1110.00 through FW1110.20, FW1060.00 through FW1060.71, and FW950.00 through FW950.H2 could allow a local attacker with administrative privileges to decrypt encrypted data due to certain hypervisor calls utilizing less entropy than requested.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
March 26, 2026	Reserved	Reserved by ibm
August 19, 2026	Published	Published (CNA: ibm)
August 25, 2026	RESCORED	RESCORED — CVE-2026-4937 (IBM PowerVM Hypervisor). CVSS 5.3 → 6 (NVD).

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
IBM	PowerVM Hypervisor	—	FW1110.00	—

Weaknesses

CWE-331

References (1)

https://www.ibm.com/support/pages/node/7283900 [Vendor Advisory]

Authoritative record: CVE-2026-4937 at cve.org

Vendors: ibm

Weaknesses: CWE-331

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-4937 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.