CVE-2021-33289

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2022-05-24. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.8Exploit: NoneExposed: 0

A fix is available — apply it.

In NTFS-3G versions < 2021.8.22, when a specially crafted MFT section is supplied in an NTFS image a heap buffer overflow can occur and allow for code execution.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
—
EPSS
39.1%
KEV
Not listed

Published

September 7, 2021

Last Modified

July 9, 2026

Advisory Details (8)

Auto-updated Jul 6, 2026
Patch available. Sources: github.
github Patch Available

OPEN SOURCE NTFS-3G SECURITY ADVISORY NTFS3G-SA-2021-0001 · Advisory · tuxera/ntfs-3g · GitHub

https://github.com/tuxera/ntfs-3g/security/advisories/GHSA-q759-8j5v-q5jp
generic

oss-security - NTFS3G-SA-2021-0001: Multiple buffer overflows in all versions of NTFS-3G

http://www.openwall.com/lists/oss-security/2021/08/30/1
generic

Data Integrity Software | Embedded & Enterprise | Tuxera

http://ntfs-3g.com
generic

[SECURITY] [DSA 4971-1] ntfs-3g security update

https://www.debian.org/security/2021/dsa-4971
generic

NTFS-3G: Multiple Vulnerabilities (GLSA 202301-01) — Gentoo security

https://security.gentoo.org/glsa/202301-01
generic

[SECURITY] Fedora 35 Update: ntfs-3g-2021.8.22-2.fc35 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HSEKTKHO5HFZHWZNJNBJZA56472KRUZI/
generic

[SECURITY] Fedora 33 Update: ntfs-3g-2021.8.22-2.fc33 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/766ISTT3KCARKFUIQT7N6WV6T63XOKG3/
generic Patch Available

[SECURITY] [DLA 2819-1] ntfs-3g security update

https://lists.debian.org/debian-lts-announce/2021/11/msg00013.html

Vendor Advisories for CVE-2021-33289(4)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatvirt:rhel-8060020220408104655.d63f516d2022-05-10redhat
redhatvirt-devel:8.2-8020120210917153657.863bb0db2021-09-30redhat
redhatvirt-devel:av-8040020210922084349.522a0ee42021-09-30redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

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

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 14× in last 7d / 48× 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.

Showing the most recent 100 of 105 total refreshes for this CVE.

  1. 2026-07-22 22:48 UTCEG score recompute
  2. 2026-07-22 14:06 UTCEPSS rescore
  3. 2026-07-22 14:06 UTCEPSS rescore
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  23. 2026-07-09 19:07 UTCEPSS rescore
  24. 2026-07-09 02:55 UTCNVD updateCVSS v3 → 7.8 · severity → HIGH
  25. 2026-07-09 01:24 UTCMITRE cvelistV5
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  42. 2026-06-12 22:40 UTCOSV refresh
  43. 2026-06-11 13:58 UTCEPSS rescore
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  73. 2026-05-26 13:42 UTCEPSS rescore
  74. 2026-05-26 10:58 UTCEG score recompute
  75. 2026-05-26 10:58 UTCVendor advisory

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Frequently asked(5)

What is CVE-2021-33289?
CVE-2021-33289 is a high vulnerability published on September 7, 2021. In NTFS-3G versions < 2021.8.22, when a specially crafted MFT section is supplied in an NTFS image a heap buffer overflow can occur and allow for code execution.
When was CVE-2021-33289 disclosed?
CVE-2021-33289 was first published in the National Vulnerability Database on September 7, 2021, with the most recent update on July 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-33289 actively exploited?
CVE-2021-33289 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 39.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2021-33289?
CVE-2021-33289 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2021-33289?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-33289, 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.

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