CVE-2021-33287

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.41% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 34.4% of scored records. A rank, not a probability.

NVD base score

7.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-07-09.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2021-09-07 00:00Z4 YR AGO

Last updated

2026-07-09 00:13Z1 MO AGO

Reserved

2021-05-20

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Medium (CVSS 6.7)

CNA CVSS vector

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Weaknesses

• CWE-20Improper Input ValidationClass
• CWE-787Out-of-bounds WriteBase
• CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferClass

Data version

5.2

Document digest

c1ded4310ca6091ccd07c60d48405b5e964a8bcc9b37d29fa4c3bd426744fe0c

• www.openwall.com[oss-security] 20210830 NTFS3G-SA-2021-0001: Multiple buffer overflows in all versions of NTFS-3Ghttp://www.openwall.com/lists/oss-security/2021/08/30/1mailing-list
• github.comhttps://github.com/tuxera/ntfs-3g/security/advisories/GHSA-q759-8j5v-q5jp
• www.debian.orgDSA-4971https://www.debian.org/security/2021/dsa-4971vendor-advisory
• lists.fedoraproject.orgFEDORA-2021-e7c8ba6301https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/766ISTT3KCARKFUIQT7N6WV6T63XOKG3/vendor-advisory
• lists.fedoraproject.orgFEDORA-2021-5b1dac797bhttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HSEKTKHO5HFZHWZNJNBJZA56472KRUZI/vendor-advisory
• lists.debian.org[debian-lts-announce] 20211116 [SECURITY] [DLA 2819-1] ntfs-3g security updatehttps://lists.debian.org/debian-lts-announce/2021/11/msg00013.htmlmailing-list
• security.gentoo.orgGLSA-202301-01https://security.gentoo.org/glsa/202301-01vendor-advisory
• lists.fedoraproject.orgFEDORA-2021-e7c8ba6301https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/766ISTT3KCARKFUIQT7N6WV6T63XOKG3/vendor-advisory
• lists.fedoraproject.orgFEDORA-2021-5b1dac797bhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HSEKTKHO5HFZHWZNJNBJZA56472KRUZI/vendor-advisory