Security readout for executives and security teams
CVE-2021-4019 is a high-severity heap-based buffer overflow in Vim. The business risk is service or workstation disruption from crashing affected Vim processes, not data theft according to the supplied CVSS. Public sources show upstream and Linux distribution updates, but not active exploitation. Exposure is likely wherever unpatched Vim packages are installed on developer workstations, servers, containers, or administrative jump hosts. The source bundle does not specify affected version ranges, so vulnerability managers should rely on vendor package advisories and fixed builds rather than version guessing. Treat this as a normal high-priority infrastructure patching item. It has high availability impact and public disclosure, but the provided sources do not show active exploitation or confidentiality impact. Mitigation focus: Apply Vim security updates from the relevant OS or package vendor.; Verify the installed build includes the upstream fix referenced by the Vim commit.; Prioritize developer, administrator, and server images where Vim is routinely present..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CWE-122: Exact CWE lookup
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Open ATT&CK lookupCVE-2021-4019 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 7.1 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H2.54Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
7.1HighVector: CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://huntr.dev/bounties/d8798584-a6c9-4619-b18f-001b9a6fca92CVE reference
- https://github.com/vim/vim/commit/bd228fd097b41a798f90944b5d1245eddd484142CVE reference
- FEDORA-2021-469afb66c9CVE reference · vendor-advisory
- FEDORA-2021-b0ac29efb1CVE reference · vendor-advisory
- [debian-lts-announce] 20220311 [SECURITY] [DLA 2947-1] vim security updateCVE reference · mailing-list
- GLSA-202208-32CVE reference · vendor-advisory
- [debian-lts-announce] 20221108 [SECURITY] [DLA 3182-1] vim security updateCVE reference · mailing-list
- https://lists.debian.org/debian-lts-announce/2025/03/msg00023.htmlCVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Heap-based Buffer Overflow
Heap-based Buffer Overflow represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.