Medium severity · published May 18, 2026
CVE-2026-21789
HCL Connections is vulnerable to broken access control
4.6
CVSS
0.1%
EPSS
No
On KEV
Description
HCL Connections contains a broken access control vulnerability that may allow unauthorized user to update data in certain scenarios.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 2% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CO
Connections · HCLSoftware
8.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-21789
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-21789
support.hcl-software.com
https://support.hcl-software.com/csm?id=kb_article&sysparm_article=KB0129719
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