CVE-2021-33639

HIGHNVD 7.57.5—

7.5

REMAP cmd of SVM driver can be used to remap read only memory as read-write, then cause read only memory/file modified.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 46.0%
KEV: Not listed

Published

March 8, 2023

Last Modified

March 4, 2025

References (2)

securities@openeulerhttps://gitee.com/openeuler/kernel/commit/e4d0684a3ce68e7f8e11408121e791cd80312b27
af854a3a-2127-422b-91ae-364da2661108https://gitee.com/openeuler/kernel/commit/e4d0684a3ce68e7f8e11408121e791cd80312b27

Weakness Classification(1)

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

CWE-749Exposed Dangerous Method or Function

Data Freshness Timeline

(refreshed 12× 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.

2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-25 05:34 UTCEG score recompute

Frequently asked(5)

What is CVE-2021-33639?

CVE-2021-33639 is a high vulnerability published on March 8, 2023. REMAP cmd of SVM driver can be used to remap read only memory as read-write, then cause read only memory/file modified.

When was CVE-2021-33639 disclosed?

CVE-2021-33639 was first published in the National Vulnerability Database on March 8, 2023, with the most recent update on March 4, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-33639 actively exploited?

CVE-2021-33639 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 46.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-33639?

CVE-2021-33639 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2021-33639?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-33639, 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-2021-33639

📅 Published

🔄 Last Modified

🔗 References (2)