What is CVE-2026-56583?

CVE-2026-56583 is a low-severity vulnerability in Hclsoftware Mycloud, classified under Insufficient Session Expiration. CVSS score: 3.1/10. Published 2026-07-21.

How severe is CVE-2026-56583?

Low severity. CVSS v3 base score is 3.1 out of 10.

Vulnerability in Hclsoftware Mycloud

CVE-2026-56583

HCL MyCloud was affected with Concurrent Login Vulnerability. It may increase the risk of unauthorized access, session hijacking, and account misuse.

Published 2026-07-21 · last modified 2026-08-03.

CVSS v3 metric

CVSS v3 base score 3.1 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.002 (11.9th percentile), scored 2026-10-23.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 12th percentile — 11.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Hclsoftware Mycloud — versions 10.8.2
Hcltech Dryice Mycloud — versions 10.8.1

Weakness classification (CWE)

CWE-613 — Insufficient Session Expiration

References

support.hcl-software.com/csm (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2026-56583?: CVE-2026-56583 is a low-severity vulnerability in Hclsoftware Mycloud, classified under Insufficient Session Expiration. CVSS score: 3.1/10. Published 2026-07-21.
How severe is CVE-2026-56583?: Low severity. CVSS v3 base score is 3.1 out of 10.