# CVE-2026-18450: Supermicro BMC  contains Unprotected IPMI Commands Accepted on Active RMCP+ Sessions vulnerability

Status: published. Published: 2026-10-27. Updated: 2026-11-04.

The BMC does not correctly enforce integrity and encryption requirements for IPMI commands. An attacker may be able to craft packets that execute arbitrary commands on an active session.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- SMCI / X12SPI: 01.07.20 (affected, custom). Source: CNA: Supermicro; platforms: BMC

## Severity and prioritization

- CVSS 3.1: 9.8 (critical); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H; source: CNA: Supermicro

- CISA KEV: No listing in collected sources

- EPSS: 0.40% as of 2026-11-04; percentile 34.45%

- SSVC: exploitation none; automatable yes; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-306

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://www.supermicro.com/en/support/security_BMC_IPMI_Oct_2026_1 (CNA: Supermicro)

## Provenance

- CNA: Supermicro: https://www.cve.org/CVERecord?id=CVE-2026-18450; retrieved 2026-11-04; source updated 2026-11-04

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-18450; retrieved 2026-11-04; source updated Not reported

Revision: 06be0f43713b34d7c5d085cf38d7abe552beb27904b9c707bc6316115e3f0647

Canonical: https://y2.dev/cve/CVE-2026-18450

## Agent and API access

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- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

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- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

Collected public records only. Check source status for coverage and freshness.