CVE-2021-39296

CRITICALNVD 10.010.0—

10.0

In OpenBMC 2.9, crafted IPMI messages allow an attacker to bypass authentication and gain full control of the system.

CVSS v3: 10.0
EG Score: 10.0(medium)
EPSS: 49.1%
KEV: Not listed

Published

September 9, 2021

Last Modified

November 21, 2024

Advisory Details (3)

Auto-updated May 23, 2026

🔬 Proof of concept available. Patch available. Sources: github.

generic

INTEL-SA-00737

https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00737.html

generic

GitHub - openbmc/openbmc: OpenBMC Distribution · GitHub

https://github.com/openbmc/openbmc

github Patch Available🟡 PoC Available

OpenBMC: remote code execution in netipmid · Advisory · google/security-research · GitHub

https://github.com/google/security-research/security/advisories/GHSA-gg9x-v835-m48q

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-287Improper Authentication

Data Freshness Timeline

(refreshed 16× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

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Frequently asked(5)

What is CVE-2021-39296?

CVE-2021-39296 is a critical vulnerability published on September 9, 2021. In OpenBMC 2.9, crafted IPMI messages allow an attacker to bypass authentication and gain full control of the system.

When was CVE-2021-39296 disclosed?

CVE-2021-39296 was first published in the National Vulnerability Database on September 9, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-39296 actively exploited?

CVE-2021-39296 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 49.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-39296?

CVE-2021-39296 has a CVSS v3 base score of 10.0 (NVD).

How do I remediate CVE-2021-39296?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-39296, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2021-39296

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CVE-2021-39296

📅 Published

🔄 Last Modified

📋 Advisory Details (3)