What is CVE-2026-21789?

CVE-2026-21789 is a medium-severity vulnerability in Hclsoftware Connections, classified under Incorrect Authorization. CVSS score: 4.6/10. Published 2026-05-18.

How severe is CVE-2026-21789?

Medium severity. CVSS v3 base score is 4.6 out of 10.

Auth bypass in Hclsoftware Connections

CVE-2026-21789

HCL Connections contains a broken access control vulnerability that may allow unauthorized user to update data in certain scenarios.

Vulnerability class: Broken Access Control

EPSS: 0.000 (7.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.6 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N.

Affected products

Hclsoftware Connections — versions 8.0

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

psirt@hcl.com

Frequently asked questions

What is CVE-2026-21789?: CVE-2026-21789 is a medium-severity vulnerability in Hclsoftware Connections, classified under Incorrect Authorization. CVSS score: 4.6/10. Published 2026-05-18.
How severe is CVE-2026-21789?: Medium severity. CVSS v3 base score is 4.6 out of 10.