CVE-2026-56584Network attack vector

Unauthenticated nginx version disclosure via server banner

Published Jul 21, 2026 · Updated Jul 21, 2026

Information disclosure in HCL IntelliOps Event Management 1.1 allows remote attackers to identify its nginx version over the network. The nginx front end includes software-version metadata in unauthenticated HTTP responses instead of suppressing its server banner. No authentication or user interaction is required; disclosure is limited to metadata that facilitates targeting of known nginx flaws.

CVSS severity5.3
Medium
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in HCL IntelliOps Event Management 1.1 allows remote attackers to identify its nginx version over the network. The nginx front end includes software-version metadata in unauthenticated HTTP responses instead of suppressing its server banner. No authentication or user interaction is required; disclosure is limited to metadata that facilitates targeting of known nginx flaws.

The record

CVE
CVE-2026-56584
Published
Jul 21, 2026
Updated
Jul 21, 2026
Vendor
HCLSoftware
Product
HCL IntelliOps Event Management
Classifications
CWE-200, T1592.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 21, 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=1.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

HCLSoftware · HCL IntelliOps Event Managementversion=1.1

Published CVSS scores

5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
3.7HCL SoftwareCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1592.002Gather Victim Host Information: Software

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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