Reference page — cumulative record through Monday, October 19, 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 N L N N U H H H 9.8 .0019 8.3 —
AFFECTED Product Versions Fixed HCL BigFix Service Management v27 – —
TIMELINE Jun 22 Reserved by HCL Sep 18 Published (CNA: HCL) Oct 14 RESCORED — CVE-2026-56590 (HCL Software HCL BigFix Service Management). CVSS 6.4 → 9.8 (NVD).
HCL BigFix Service Management is affected by an Unrestricted File Upload vulnerability due to improper file validation controls, which could allow an unauthenticated attacker to upload and execute malicious payloads, resulting in a complete server compromise.
| Date | Event | Detail |
|---|---|---|
| June 22, 2026 | Reserved | Reserved by HCL |
| September 18, 2026 | Published | Published (CNA: HCL) |
| October 14, 2026 | RESCORED | RESCORED — CVE-2026-56590 (HCL Software HCL BigFix Service Management). CVSS 6.4 → 9.8 (NVD). |
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|---|---|---|---|
| HCL Software | HCL BigFix Service Management | — | v27 | — |
Authoritative record: CVE-2026-56590 at cve.org
Vendors: hcl software
Weaknesses: CWE-434
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-56590 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 Monday, October 19, 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.
