---
cve: "CVE-2026-21789"
severity: "MEDIUM"
cvss: 4.6
epss: "0.1%"
vendor: "HCLSoftware"
kev: false
exploited: false
published: "2026-05-18 20:16:37"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-11-09T11:33:23+01:00"
---

# CVE-2026-21789

> 4.6 MEDIUM

## Beschreibung

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

## CNA-Record (Kanon, cvelistV5)

- CNA: **HCL**
- State: PUBLISHED
- Stand: 2026-05-18 19:54:06
- CNA-CVSS: **4.6** (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N`)

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **none**
  - Automatable: **no**
  - Technical Impact: **partial**

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Erforderlich | good |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Gering | warn |
| I Integrität | Gering | warn |
| A Verfügbarkeit | Keine | good |

## Schwachstellen-Klasse

- **CWE-863** — Incorrect Authorization
  The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

## Referenzen

- <https://support.hcl-software.com/csm?id=kb_article&sysparm_article=KB0129719>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-21789/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_