CVE-2021-3927

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

1.70% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 76.8% 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:N/UI:R/S:U/C:H/I:H/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-10-08.

Red Hat severity

Low. 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

2021-11-05 00:00Z4 YR AGO

Last updated

2026-10-08 21:03Z20 DAYS AGO

Reserved

2021-11-04

Assigning CNA

@huntrdev

Record state

PUBLISHED

Severity

High (CVSS 7.3)

CNA CVSS vector

CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:H

Weaknesses

• CWE-122Heap-based Buffer OverflowVariant
• CWE-787Out-of-bounds WriteBase

Data version

5.2

Document digest

c531864a63d76a5cef5b735c4e84f98e3a467d6f86f534e5c1a698538162142a

• huntr.devhttps://huntr.dev/bounties/9c2b2c82-48bb-4be9-ab8f-a48ea252d1b0
• github.comhttps://github.com/vim/vim/commit/0b5b06cb4777d1401fdf83e7d48d287662236e7e
• lists.fedoraproject.orgFEDORA-2021-58ab85548dhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PGW56Z6IN4UVM3E5RXXF4G7LGGTRBI5C/vendor-advisory
• lists.fedoraproject.orgFEDORA-2021-cfadac570ahttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BCQWPEY2AEYBELCMJYHYWYCD3PZVD2H7/vendor-advisory
• lists.fedoraproject.orgFEDORA-2021-b0ac29efb1https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FNXY7T5OORA7UJIMGSJBGHFMU6UZWS6P/vendor-advisory
• www.openwall.com[oss-security] 20220114 Re: 3 new CVE's in vimhttp://www.openwall.com/lists/oss-security/2022/01/15/1mailing-list
• lists.debian.org[debian-lts-announce] 20220311 [SECURITY] [DLA 2947-1] vim security updatehttps://lists.debian.org/debian-lts-announce/2022/03/msg00018.htmlmailing-list
• security.gentoo.orgGLSA-202208-32https://security.gentoo.org/glsa/202208-32vendor-advisory
• lists.debian.org[debian-lts-announce] 20221108 [SECURITY] [DLA 3182-1] vim security updatehttps://lists.debian.org/debian-lts-announce/2022/11/msg00009.htmlmailing-list