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PatchSiren cyber security CVE debrief

CVE-2026-21837 HCLSoftware CVE debrief

CVE-2026-21837 is an OS command injection vulnerability in HCL Digital Experience's Digital Asset Management API. An attacker could execute arbitrary OS commands, potentially leading to a complete system takeover and data compromise. The vulnerability has a CVSS score of 8.7 and is considered HIGH severity.

Vendor
HCLSoftware
Product
Digital Experience
CVSS
HIGH 8.7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-05
Original CVE updated
2026-07-23
Advisory published
2026-06-05
Advisory updated
2026-07-23

Who should care

Administrators and users of HCL Digital Experience, particularly those using version 9.5, should be aware of this vulnerability and take necessary actions to mitigate it.

Technical summary

The vulnerability is caused by an OS command injection weakness (CWE-78) in the Digital Asset Management API of HCL Digital Experience. This allows an attacker with low privileges to execute arbitrary OS commands, potentially leading to a complete system takeover and data compromise.

Defensive priority

HIGH

Recommended defensive actions

  • Apply the patch or fix provided by the vendor (see resourceLinkAnnotations 'ref-4')
  • Restrict access to the Digital Asset Management API to only necessary users and services
  • Monitor the system for suspicious activity and implement additional security measures as needed

Evidence notes

The CVE record (resourceLinkAnnotations 'cve-org') and NVD detail (resourceLinkAnnotations 'nvd') provide additional information about the vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-21837 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-21837

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

  • CVE-2026-21837 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-21837

    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.