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IntelliOps IEM EUVDEUVD-2026-63323

| CVE-2026-21784 MEDIUM
Information Exposure (CWE-200)
2026-08-20 HCL GHSA-hg5c-cxw6-wgq4
4.8
CVSS 3.1 · Vendor: HCL
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Severity by source

Vendor (HCL) PRIMARY
4.8 MEDIUM
AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
vuln.today AI
4.8 MEDIUM

PR:H and UI:R reflect mandatory high-privilege victim session and active social engineering; S:C captures cross-origin browser boundary crossing; no availability impact applies.

3.1 AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
4.0 AV:N/AC:L/AT:N/PR:H/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

Primary rating from Vendor (HCL).

CVSS VectorVendor: HCL

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

Lifecycle Timeline

1
Analysis Generated
Aug 20, 2026 - 12:58 vuln.today

DescriptionCVE.org

HCL IntelliOps Event Management (IEM) is affected by missing or insecure Cross-Origin Security headers. This issue makes the application's environment and resources susceptible to unauthorized external interaction and potential exploitation.

AnalysisAI

Missing or insecure Cross-Origin Resource Sharing (CORS) headers in HCL IntelliOps Event Management (IEM) expose the application to unauthorized cross-origin browser interactions. The CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N vector indicates that a highly privileged IEM user must be socially engineered into visiting a malicious page while authenticated, allowing an attacker's script to read IEM responses or issue limited requests on the victim's behalf. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Attacker crafts malicious webpage with cross-origin IEM requests
Delivery
Phish or lure high-privilege IEM user to visit page
Exploit
Victim's browser sends credentialed cross-origin request to IEM
Execution
IEM responds without restrictive CORS headers
Persist
Browser permits attacker script to read response
Impact
Attacker exfiltrates sensitive IEM data

Vulnerability AssessmentAI

Exploitation Exploitation requires a user holding high-privileged credentials in IEM (PR:H per CVSS vector) to actively visit an attacker-controlled web page in the same browser where an IEM session is active (UI:R). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.8 Medium score reflects a meaningful but constrained attack surface: the two most significant limiters are PR:H (the victim must hold high-privileged IEM credentials) and UI:R (the victim must actively visit an attacker-controlled page while authenticated). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker registers or compromises a publicly reachable web page and embeds JavaScript that issues fetch requests with credentials to a target organization's IEM instance. A high-privileged IEM user is lured to this page - via a phishing email or malicious link - while their IEM browser session is active; because IEM returns overly permissive or absent CORS headers, the browser forwards the session cookie and allows the attacker's script to read the IEM API response, potentially harvesting event data, configuration details, or user information. …
Remediation The primary remediation is to apply the vendor-supplied fix documented in the HCL Software advisory at https://support.hcl-software.com/csm?id=kb_article&sysparm_article=KB0132456. … Detailed patch versions, workarounds, and compensating controls in full report.

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EUVD-2026-63323 vulnerability details – vuln.today

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