Security readout for executives and security teams
CVE-2021-4173 is a use-after-free flaw in Vim. It is not described as remotely reachable over the network, but a vulnerable editor on workstations or servers could allow serious integrity or availability impact when triggered with user interaction. Exposure is most likely on Linux, macOS, and developer or administrator systems with Vim installed from vulnerable packages. Internet-facing exposure is not indicated by the provided sources. Treat this as a moderate patching item, not an emergency based on the provided evidence. Prioritize systems where privileged users edit files or where Vim is part of standard administrator workflows. Mitigation focus: Upgrade Vim through the operating system or vendor package channel.; Check upstream Vim guidance and the referenced fixing commit for source-built installations.; Prioritize developer workstations, jump hosts, and administrative servers using Vim..
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
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-416: Exact CWE lookup
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Open ATT&CK lookupCVE-2021-4173 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.8 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:H/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:L/UI:R/S:U/C:L/I:H/A:H1.35.5Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
6.8MediumVector: CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://huntr.dev/bounties/a1b236b9-89fb-4ccf-9689-ba11b471e766CVE reference · x_refsource_CONFIRM
- https://github.com/vim/vim/commit/9c23f9bb5fe435b28245ba8ac65aa0ca6b902c04CVE reference · x_refsource_MISC
- FEDORA-2022-a3d70b50f0CVE reference · vendor-advisory, x_refsource_FEDORA
- FEDORA-2022-48b86d586fCVE reference · vendor-advisory, x_refsource_FEDORA
- https://support.apple.com/kb/HT213183CVE reference · x_refsource_CONFIRM
- https://support.apple.com/kb/HT213256CVE reference · x_refsource_CONFIRM
- https://support.apple.com/kb/HT213343CVE reference · x_refsource_CONFIRM
- GLSA-202208-32CVE reference · vendor-advisory, x_refsource_GENTOO
- 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.
Use After Free
Use After Free represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.