CVE-2026-28421

Name: CVE-2026-28421
Creator: NVD / NIST
Published: 2026-02-27T22:16:25.493+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.18%

Last modified Jun 17, 2026

CVE-2026-28421 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. Vim is an open source, command line text editor. Versions prior to 9.2.0077 have a heap-buffer-overflow and a segmentation fault (SEGV) exist in Vim's swap file recovery logic. EPSS estimates a 0.18% chance of exploitation in the next 30 days.

Description

Vim is an open source, command line text editor. Versions prior to 9.2.0077 have a heap-buffer-overflow and a segmentation fault (SEGV) exist in Vim's swap file recovery logic. Both are caused by unvalidated fields read from crafted pointer blocks within a swap file. Version 9.2.0077 fixes the issue.

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

0.18%

7.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Vim	Vim	< 9.2.0077

References

https://github.com/vim/vim/commit/65c1a143c331c886dc28Patch
https://github.com/vim/vim/releases/tag/v9.2.0077Product
https://github.com/vim/vim/security/advisories/GHSA-r2gw-2x48-jj5pPatch, Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/02/27/10Mailing List, Patch, Third Party Advisory

Timeline

Published: Feb 27, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-28421?

How severe is CVE-2026-28421?

CVE-2026-28421 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.18% probability of exploitation in the next 30 days.

How do I fix CVE-2026-28421?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-28421?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST