High severity · published Feb 27, 2026
CVE-2026-28421
Vim is an open source, command line text editor
7.8
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 11% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
VI
Vim · Vim
before 9.2.0077 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-28421
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-28421
Patch
https://github.com/vim/vim/commit/65c1a143c331c886dc28
Product
https://github.com/vim/vim/releases/tag/v9.2.0077
Patch
https://github.com/vim/vim/security/advisories/GHSA-r2gw-2x48-jj5p
Mailing List
http://www.openwall.com/lists/oss-security/2026/02/27/10
More from Vim
9.8
CVE-2020-20703
Buffer Overflow vulnerability in VIM v.8.1.2135 allows a remote attacker to execute arbitrary code via the operand parameter
9.8
CVE-2022-3520
Heap-based Buffer Overflow in GitHub repository vim/vim prior to 9.0.0765
9.8
CVE-2022-0318
Heap-based Buffer Overflow in vim/vim prior to 8.2
9.8
CVE-2017-6350
An integer overflow at an unserialize_uep memory allocation site would occur for vim before patch 8.0.0378, if it does not properly validate values for tree length when reading a…
9.8
CVE-2017-6349
An integer overflow at a u_read_undo memory allocation site would occur for vim before patch 8.0.0377, if it does not properly validate values for tree length when reading a…