CVE-2021-4187

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

1.75% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 77.8% 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 2026-06-17.

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

2021-12-29 17:10Z4 YR AGO

Last updated

2025-11-03 20:34Z11 MO AGO

Reserved

2021-12-28

Assigning CNA

@huntrdev

Record state

PUBLISHED

Severity

Medium (CVSS 6.8)

CNA CVSS vector

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

Weaknesses

• CWE-416Use After FreeVariant

Data version

5.2

Document digest

48b0da652829a0494d63bb1e14924b0a2e05abcc773f4869661053568071303f

• huntr.devhttps://huntr.dev/bounties/a8bee03a-6e2e-43bf-bee3-4968c5386a2ex_refsource_CONFIRM
• github.comhttps://github.com/vim/vim/commit/4bf1006cae7e87259ccd5219128c3dba75774441x_refsource_MISC
• lists.fedoraproject.orgFEDORA-2022-a3d70b50f0https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2EY2VFBU3YGGWI5BW4XKT3F37MYGEQUD/vendor-advisoryx_refsource_FEDORA
• www.openwall.com[oss-security] 20220114 Re: 3 new CVE's in vimhttp://www.openwall.com/lists/oss-security/2022/01/15/1mailing-listx_refsource_MLIST
• lists.fedoraproject.orgFEDORA-2022-48b86d586fhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3FH2J57GDA2WMBS6J56F6QQRA6BXQQFZ/vendor-advisoryx_refsource_FEDORA
• support.apple.comhttps://support.apple.com/kb/HT213183x_refsource_CONFIRM
• seclists.org20220314 APPLE-SA-2022-03-14-4 macOS Monterey 12.3http://seclists.org/fulldisclosure/2022/Mar/29mailing-listx_refsource_FULLDISC
• support.apple.comhttps://support.apple.com/kb/HT213256x_refsource_CONFIRM
• seclists.org20220516 APPLE-SA-2022-05-16-3 macOS Big Sur 11.6.6http://seclists.org/fulldisclosure/2022/May/35mailing-listx_refsource_FULLDISC
• support.apple.comhttps://support.apple.com/kb/HT213343x_refsource_CONFIRM
• seclists.org20220721 APPLE-SA-2022-07-20-4 Security Update 2022-005 Catalinahttp://seclists.org/fulldisclosure/2022/Jul/14mailing-listx_refsource_FULLDISC
• security.gentoo.orgGLSA-202208-32https://security.gentoo.org/glsa/202208-32vendor-advisoryx_refsource_GENTOO
• lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/03/msg00023.html