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PatchSiren cyber security CVE debrief

CVE-2026-3821 SMCI CVE debrief

The CVE record for CVE-2026-3821 was published on 2026-07-22T07:16:35.413Z and has not been modified since then. The NVD entry is currently marked as Received. Supermicro SMASH services contain an arbitrary code execution vulnerability in X14DBG-DAP and X14DBI. An authorized attacker can exploit SMASH's input capability to compromise data integrity or launch a Denial-of-Service (DoS) attack against the BMC. Users of Supermicro X14DBG-DAP and X14DBI products should review and apply security updates. The debrief is based on the supplied source corpus and may not reflect the full scope of the vulnerability.

Vendor
SMCI
Product
X14DBG-DAP,X14DBI
CVSS
HIGH 8.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-22
Original CVE updated
2026-07-22
Advisory published
2026-07-22
Advisory updated
2026-07-22

Who should care

Users of Supermicro X14DBG-DAP and X14DBI products should review and apply security updates. Operators of affected systems, platform administrators, vulnerability management teams, and security teams should assess the impact of this vulnerability on their environments. They should also monitor BMC for suspicious activity and review compensating controls for exposed systems while remediation is scheduled and verified.

Technical summary

Supermicro SMASH services contain an arbitrary code execution vulnerability in X14DBG-DAP and X14DBI. An authorized attacker can exploit SMASH's input capability to compromise data integrity or launch a Denial-of-Service (DoS) attack against the BMC. The vulnerability has a high CVSS score of 8.8, indicating high severity. Users of affected products should review and apply security updates provided by Supermicro.

Defensive priority

High priority due to high CVSS score of 8.8 and potential for data integrity compromise or DoS attacks.

Recommended defensive actions

  • Apply security updates provided by Supermicro
  • Review and limit access to SMASH services
  • Monitor BMC for suspicious activity
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

Evidence is limited; further verification is needed. The CVE record was published on 2026-07-22T07:16:35.413Z and has not been modified since then. The NVD entry is currently Received. Limited source detail is available, and defenders should verify the affected scope and severity with Supermicro.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-3821 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-3821

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

  • CVE-2026-3821 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-3821

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

Supplemental references

  • Source reference

    Unverified legacy reference

    URL: https://www.supermicro.com/en/support/security_BMC_IPMI_Jul_2026

    def9a96e-e099-41a9-bfac-30fd4f82c411

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.