CVE-2026-21836Network attack vector

Sensitive-data disclosure via ignored document access controls

Published May 20, 2026 · Updated May 20, 2026

Missing authorization in HCLSoftware Domino IQ 14.5.1 allows remote authenticated users to read restricted documents through AI queries. The RAG retrieval path ignores document-level access restrictions when selecting data returned for a query. A valid Domino account and access to the AI query interface are required; exploitation discloses data without altering it or interrupting service.

CVSS severity6.5
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in HCLSoftware Domino IQ 14.5.1 allows remote authenticated users to read restricted documents through AI queries. The RAG retrieval path ignores document-level access restrictions when selecting data returned for a query. A valid Domino account and access to the AI query interface are required; exploitation discloses data without altering it or interrupting service.

The record

CVE
CVE-2026-21836
Published
May 20, 2026
Updated
May 20, 2026
Vendor
HCLSoftware
Product
Domino IQ
Classifications
CWE-862, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 20, 2026CVE publishedPublication date reported by the CVE source.
  2. May 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=14.5.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

HCLSoftware · Domino IQversion=14.5.1

Published CVSS scores

6.5HCL SoftwareCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1213Data from Information Repositories

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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