CVE-2021-3778

Name: CVE-2021-3778
Creator: NVD / NIST
Published: 2021-09-15T08:15:06.737+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 1.61%

Last modified Jun 17, 2026

CVE-2021-3778 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. vim is vulnerable to Heap-based Buffer Overflow. EPSS estimates a 1.61% chance of exploitation in the next 30 days.

Description

vim is vulnerable to Heap-based Buffer Overflow

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

1.61%

72.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Vim	Vim	< 8.2.3409
Fedoraproject	Fedora	33
Fedoraproject	Fedora	34
Fedoraproject	Fedora	35
Debian	Debian Linux	9.0
Netapp	Ontap Select Deploy Administration Utility	All versions

References

http://www.openwall.com/lists/oss-security/2021/10/01/1Mailing List
https://github.com/vim/vim/commit/65b605665997fad54ef39a93199e305af2fe4d7fPatch, Third Party Advisory
https://huntr.dev/bounties/d9c17308-2c99-4f9f-a706-f7f72c24c273Exploit, Issue Tracking, Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/01/msg00003.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7K4JJBIH3OQSZRVTWKCJCDLGMFGQ5DOH/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/S42L4Z4DTW4LHLQ4FJ33VEOXRCBE7WN4/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TE62UMYBZE4AE53K6OBBWK32XQ7544QM/
https://security.gentoo.org/glsa/202208-32Third Party Advisory
https://security.netapp.com/advisory/ntap-20221118-0003/Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/10/01/1Mailing List
https://github.com/vim/vim/commit/65b605665997fad54ef39a93199e305af2fe4d7fPatch, Third Party Advisory
https://huntr.dev/bounties/d9c17308-2c99-4f9f-a706-f7f72c24c273Exploit, Issue Tracking, Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/01/msg00003.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7K4JJBIH3OQSZRVTWKCJCDLGMFGQ5DOH/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/S42L4Z4DTW4LHLQ4FJ33VEOXRCBE7WN4/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TE62UMYBZE4AE53K6OBBWK32XQ7544QM/
https://security.gentoo.org/glsa/202208-32Third Party Advisory
https://security.netapp.com/advisory/ntap-20221118-0003/Third Party Advisory

Timeline

Published: Sep 15, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-3778?

vim is vulnerable to Heap-based Buffer Overflow

How severe is CVE-2021-3778?

CVE-2021-3778 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 1.61% probability of exploitation in the next 30 days.

How do I fix CVE-2021-3778?

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-2021-3778?

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

Scan your code now

Source: NVD / NIST