CVE-2022-23821

CRITICALNVD 9.89.8—

9.8

Improper access control in System Management Mode (SMM) may allow an attacker to write to SPI ROM potentially leading to arbitrary code execution.

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 57.9%
KEV: Not listed

Published

November 14, 2023

Last Modified

November 21, 2024

References (4)

psirt@amdhttps://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-4002
psirt@amdhttps://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-5001
af854a3a-2127-422b-91ae-364da2661108https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-4002
af854a3a-2127-422b-91ae-364da2661108https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-5001

Data Freshness Timeline

(refreshed 13× in last 7d / 55× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

2026-06-23 21:31 UTCEPSS rescore
2026-06-23 21:31 UTCEPSS rescore
2026-06-22 14:24 UTCEPSS rescore
2026-06-21 14:55 UTCEPSS rescore
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2026-06-16 17:51 UTCEPSS rescore
2026-06-15 17:46 UTCEPSS rescore
2026-06-14 23:15 UTCEPSS rescore
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2026-06-13 22:58 UTCEPSS rescore
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2026-06-12 23:10 UTCEPSS rescore
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2026-06-11 13:58 UTCEPSS rescore
2026-06-11 13:58 UTCEPSS rescore
2026-06-10 22:16 UTCEPSS rescore
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2026-06-08 14:15 UTCEPSS rescore
2026-06-08 14:15 UTCEPSS rescore
2026-06-07 15:23 UTCEPSS rescore
2026-06-07 15:23 UTCEPSS rescore
2026-06-06 13:46 UTCEPSS rescore
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2026-06-05 22:45 UTCEPSS rescore
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2026-06-04 13:11 UTCEPSS rescore
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2026-06-02 20:11 UTCEPSS rescore
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2026-06-02 20:11 UTCEPSS rescore
2026-06-01 13:50 UTCEPSS rescore
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2026-06-01 13:50 UTCEPSS rescore
2026-05-31 22:29 UTCEPSS rescore
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2026-05-31 00:15 UTCEPSS rescore
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2026-05-29 13:42 UTCEPSS rescore
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2026-05-28 13:43 UTCEPSS rescore
2026-05-27 13:39 UTCEPSS rescore
2026-05-27 13:39 UTCEPSS rescore
2026-05-26 13:43 UTCEPSS rescore
2026-05-26 07:17 UTCEPSS rescore
2026-05-26 07:17 UTCEPSS rescore
2026-05-24 13:59 UTCEG score recompute
2026-05-24 13:59 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2022-23821?

CVE-2022-23821 is a critical vulnerability published on November 14, 2023. Improper access control in System Management Mode (SMM) may allow an attacker to write to SPI ROM potentially leading to arbitrary code execution.

When was CVE-2022-23821 disclosed?

CVE-2022-23821 was first published in the National Vulnerability Database on November 14, 2023, 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-2022-23821 actively exploited?

CVE-2022-23821 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 57.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2022-23821?

CVE-2022-23821 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2022-23821?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-23821, 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

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CVE-2022-23821

📅 Published

🔄 Last Modified

🔗 References (4)