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CVE-2026-56586 HCLSoftware CVE debrief

CVE-2026-56586 is a LOW severity vulnerability in HCL IEM related to a missing X-Content-Type-Options Header. This issue may enable attackers to perform SSL stripping or man-in-the-middle attacks and intercept sensitive data. The CVE record was published on 2026-07-21T16:17:18.107Z and was last modified on 2026-07-22T19:17:07.803Z. To address this vulnerability, it is essential to understand the potential impact and scope. The vulnerability is caused by the absence of a security header that prevents MIME-sniffing attacks, which can lead to security vulnerabilities. The CVSS score for this vulnerability is 3.1, indicating a LOW severity level. Security teams responsible for HCL IEM should assess and mitigate this vulnerability to prevent potential SSL stripping or man-in-the-middle attacks. Further investigation and verification are necessary to fully understand the impact and scope of this vulnerability, given the limited information available in the CVE record and NVD entry.

Vendor
HCLSoftware
Product
IntelliOps Event Management
CVSS
LOW 3.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-21
Original CVE updated
2026-07-22
Advisory published
2026-07-21
Advisory updated
2026-07-22

Who should care

Security teams responsible for HCL IEM should assess and mitigate this vulnerability to prevent potential SSL stripping or man-in-the-middle attacks.

Technical summary

The vulnerability is caused by a missing X-Content-Type-Options Header in HCL IEM. This header is used to prevent MIME-sniffing attacks, which can lead to security vulnerabilities. The CVSS score for this vulnerability is 3.1, indicating a LOW severity level. The CVSS vector is CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N.

Defensive priority

Apply patches or mitigations to HCL IEM to prevent exploitation of this vulnerability.

Recommended defensive actions

  • Apply patches or updates provided by the vendor to address the missing X-Content-Type-Options Header.
  • Implement compensating controls, such as web application firewalls or intrusion detection systems, to detect and prevent potential attacks.
  • Monitor HCL IEM systems for suspicious activity and ensure that they are properly configured and maintained.

Evidence notes

The CVE record and NVD entry provide limited information about the vulnerability. Further investigation and verification are necessary to fully understand the impact and scope of this vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-56586 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-56586

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-56586 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-56586

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.