CVE-2026-21784Network attack vector

Cross-origin data exposure via missing headers

Published Aug 20, 2026 · Updated Aug 20, 2026

Cross-origin policy weakness in HCL IntelliOps Event Management 1.4.0 allows remote authenticated users to expose data via browser-mediated cross-origin requests. HCL has disclosed only that affected HTTP responses omit or misconfigure cross-origin security headers, weakening browser origin enforcement; it has not identified the exact headers or endpoints involved. The CNA vector requires high privileges and user interaction, so exposure depends on an authenticated workflow that causes a browser to issue the cross-origin request, with published impact limited to low-severity confidentiality and integrity effects.

CVSS severity4.8
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-origin policy weakness in HCL IntelliOps Event Management 1.4.0 allows remote authenticated users to expose data via browser-mediated cross-origin requests. HCL has disclosed only that affected HTTP responses omit or misconfigure cross-origin security headers, weakening browser origin enforcement; it has not identified the exact headers or endpoints involved. The CNA vector requires high privileges and user interaction, so exposure depends on an authenticated workflow that causes a browser to issue the cross-origin request, with published impact limited to low-severity confidentiality and integrity effects.

The record

CVE
CVE-2026-21784
Published
Aug 20, 2026
Updated
Aug 20, 2026
Vendor
HCL Software
Product
HCL IntelliOps Event Management
Classifications
CWE-200
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Aug 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 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=v1.4.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

HCL Software · HCL IntelliOps Event Managementversion=v1.4.0

Published CVSS scores

4.8HCL SoftwareCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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