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Full vulnerability report · 2021
CVE-2021-4166High confidence

Out-of-bounds Read in vim/vim

vim · vim/vim

7.1HighCVSS 3.1
Recommended action
Within 7 days

High technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Patch available
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2021-34032

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

High technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Patch available
01

What, why and how

vim is vulnerable to Out-of-bounds Read

What

vim is vulnerable to Out-of-bounds Read

Why

The product reads data past the end, or before the beginning, of the intended buffer.

How

An attacker operating through local access may attempt exploitation without authentication after a user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

vim is vulnerable to Out-of-bounds Read

Why

The product reads data past the end, or before the beginning, of the intended buffer.

How

An attacker operating through local access may attempt exploitation without authentication after a user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
Reference recorded

A structured CVE source labels at least one public reference as exploit material. BlackTree has not independently validated that it is safe, reliable or weaponised.

Likely attack path
local access → Out-of-bounds Read → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Local
Privileges required
None: unauthenticated exploitation is possible
User interaction
Required interaction required
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-125 ↗

CWE-125: Out-of-bounds Read. The product reads data past the end, or before the beginning, of the intended buffer.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVLocalAttack vector: The attacker needs local access to the vulnerable system.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UIRequiredUser interaction: Another user must perform an action for exploitation to succeed.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.INoneIntegrity impact: No direct loss is represented by this metric.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
The issue can support a local privilege or sandbox boundary transition; normal system utilities may then be available in the gained context.
UnauthenticatedCWE-125Public exploit reference
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

BSI · German · WID-SEC-W-2022-0778Apple macOS: Mehrere Schwachstellen

Ein Angreifer aus dem angrenzenden Netzwerk oder ein entfernter, anonymer, authentisierter oder lokaler Angreifer kann mehrere Schwachstellen in Apple macOS ausnutzen, um vertrauliche Informationen offenzulegen, seine Privilegien zu erweitern, Sicherheitsmaßnahmen zu umgehen, beliebigen Code auszuführen, Dateien zu manipulieren, einen Denial-of-Service-Zustand zu verursachen, Informationen falsch darzustellen und einen Cross-Site-Scripting-Angriff durchzuführen.

Official advisory
BSI · German · WID-SEC-W-2022-1057Apple macOS: Mehrere Schwachstellen

Ein entfernter, anonymer, authentisierter oder lokaler Angreifer kann mehrere Schwachstellen in Apple macOS ausnutzen, um seine Privilegien zu erweitern, beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, einen Denial-of-Service-Zustand herbeizuführen, vertrauliche Informationen offenzulegen und im schlimmsten Fall das System zu kompromittieren.

Official advisory
BSI · German · WID-SEC-W-2024-0794Dell ECS: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Dell ECS ausnutzen, um seine Privilegien zu erweitern, beliebigen Programmcode mit Administratorrechten auszuführen, Informationen offenzulegen, Dateien zu manipulieren, einen Cross-Site-Scripting-Angriff durchzuführen, Sicherheitsvorkehrungen zu umgehen oder einen Denial of Service Zustand herbeizuführen.

Official advisory
BSI · German · WID-SEC-W-2022-1335Xerox FreeFlow Print Server: Mehrere Schwachstellen

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Xerox FreeFlow Print Server ausnutzen, um die Vertraulichkeit, Verfügbarkeit und Integrität des Systems zu gefährden.

Official advisory
BSI · German · WID-SEC-W-2022-1056Apple macOS: Mehrere Schwachstellen

Ein entfernter anonymer, authentisierter, lokaler oder physischer Angreifer kann mehrere Schwachstellen in Apple macOS ausnutzen, , um seine Privilegien zu erweitern, vertrauliche Informationen offenzulegen, Sicherheitsmaßnahmen zu umgehen, einen Denial-of-Service-Zustand herbeizuführen, einen Spoofing-Angriff durchzuführen und beliebigen Code auszuführen.

Official advisory
BSI · German · WID-SEC-W-2022-0354vim: Schwachstelle ermöglicht Denial of Service und Offenlegung von Informationen

Ein entfernter, anonymer Angreifer kann eine Schwachstelle in vim ausnutzen, um einen Denial of Service Angriff durchzuführen und Daten offenzulegen.

Official advisory
CERT-FR · French · CERTFR-2025-AVI-0693Multiples vulnérabilités dans VMware Tanzu

cve.org/CVERecord?id=CVE-2021-32256 Référence CVE CVE-2021-3572 https://www.cve.org/CVERecord?id=CVE-2021-3572 Référence CVE CVE-2021-3826 https://www.cve.org/CVERecord?id=CVE-2021-3826 Référence CVE CVE-2021-3927 https://www.cve.org/CVERecord?id=CVE-2021-3927 Référence CVE CVE-2021-3928 https://www.cve.org/CVERecord?id=CVE-2021-3928 Référence CVE CVE-2021-3968 https://www.cve.org/CVERecord?id=CVE-2021-3968 Référence CVE CVE-2021-3973 https://www.cve.org/CVERecord?id=CVE-2021-3973 Référence CVE CVE-2021-3974 https://www.cve.org/CVERecord?id=CVE-2021-3974 Référence CVE CVE-2021-4136 https://www.cve.org/CVERecord?id=CVE-2021-4136 Référence CVE CVE-2021-4166 https://www.cve.org/CVERecord?id=CVE-2021-4166 Référence CVE CVE-2021-4173 https://www.cve.org/CVERecord?id=CVE-2021-4173 Référence CVE CVE-2021-4187 https://www.cve.org/CVERecord?id=CVE-2021-4187 Référence CVE CVE-2021-45078 https://www.cve.org/CVERecord?id=CVE-2021-45078 Référence CVE CVE-2022-0213 https://www.cve.org/CVERecord?id=CVE-2022-0213 Référence CVE CVE-2022-0351 https://www.cve.org/CVERecord?id=CVE-2022-0351 Référence CVE CVE-2022-1616 https://www.cve.org/CVERecord?id=CVE-2022-1616 Référence CVE CVE-2022-1619 https://www.cve.org/CVERecord?id=CVE-2022-1619 Référence CVE CVE-2022-1620 https://www.cve.org/CVERecord?id=CVE-2022-1620

Official advisory
CERT-FR · French · CERTFR-2025-AVI-0585Multiples vulnérabilités dans VMware Tanzu

org/CVERecord?id=CVE-2021-31535 Référence CVE CVE-2021-33430 https://www.cve.org/CVERecord?id=CVE-2021-33430 Référence CVE CVE-2021-34141 https://www.cve.org/CVERecord?id=CVE-2021-34141 Référence CVE CVE-2021-3927 https://www.cve.org/CVERecord?id=CVE-2021-3927 Référence CVE CVE-2021-3928 https://www.cve.org/CVERecord?id=CVE-2021-3928 Référence CVE CVE-2021-3968 https://www.cve.org/CVERecord?id=CVE-2021-3968 Référence CVE CVE-2021-3973 https://www.cve.org/CVERecord?id=CVE-2021-3973 Référence CVE CVE-2021-3974 https://www.cve.org/CVERecord?id=CVE-2021-3974 Référence CVE CVE-2021-4136 https://www.cve.org/CVERecord?id=CVE-2021-4136 Référence CVE CVE-2021-4166 https://www.cve.org/CVERecord?id=CVE-2021-4166 Référence CVE CVE-2021-4173 https://www.cve.org/CVERecord?id=CVE-2021-4173 Référence CVE CVE-2021-4187 https://www.cve.org/CVERecord?id=CVE-2021-4187 Référence CVE CVE-2021-45261 https://www.cve.org/CVERecord?id=CVE-2021-45261 Référence CVE CVE-2022-0213 https://www.cve.org/CVERecord?id=CVE-2022-0213 Référence CVE CVE-2022-0351 https://www.cve.org/CVERecord?id=CVE-2022-0351 Référence CVE CVE-2022-1616 https://www.cve.org/CVERecord?id=CVE-2022-1616 Référence CVE CVE-2022-1619 https://www.cve.org/CVERecord?id=CVE-2022-1619 Référence CVE CVE-2022-1620 https://www.cve.org/CVERecord?id=CVE-2022-1620

Official advisory
CERT-FR · French · CERTFR-2022-AVI-665Multiples vulnérabilités dans les produits Apple

341 Bulletin de sécurité Apple HT213342 du 20 juillet 2022 https://support.apple.com/fr-fr/HT213342 Bulletin de sécurité Apple HT213343 du 20 juillet 2022 https://support.apple.com/fr-fr/HT213343 Bulletin de sécurité Apple HT213344 du 20 juillet 2022 https://support.apple.com/fr-fr/HT213344 Bulletin de sécurité Apple HT213345 du 20 juillet 2022 https://support.apple.com/fr-fr/HT213345 Bulletin de sécurité Apple HT213346 du 20 juillet 2022 https://support.apple.com/fr-fr/HT213346 Référence CVE CVE-2021-28544 https://www.cve.org/CVERecord?id=CVE-2021-28544 Référence CVE CVE-2021-4136 https://www.cve.org/CVERecord?id=CVE-2021-4136 Référence CVE CVE-2021-4166 https://www.cve.org/CVERecord?id=CVE-2021-4166 Référence CVE CVE-2021-4173 https://www.cve.org/CVERecord?id=CVE-2021-4173 Référence CVE CVE-2021-4187 https://www.cve.org/CVERecord?id=CVE-2021-4187 Référence CVE CVE-2021-4192 https://www.cve.org/CVERecord?id=CVE-2021-4192 Référence CVE CVE-2021-4193 https://www.cve.org/CVERecord?id=CVE-2021-4193 Référence CVE CVE-2021-46059 https://www.cve.org/CVERecord?id=CVE-2021-46059 Référence CVE CVE-2022-0128 https://www.cve.org/CVERecord?id=CVE-2022-0128 Référence CVE CVE-2022-0156 https://www.cve.org/CVERecord?id=CVE-2022-0156 Référence CVE CVE-2022-0158 https://www.cve.org/CVERecord?id=CVE-2022-0158

Official advisory
CERT-FR · French · CERTFR-2022-AVI-467Multiples vulnérabilités dans le noyau Linux de SUSE

669-1/ Bulletin de sécurité SUSE suse-su-20221676-1 du 16 mai 2022 https://www.suse.com/support/update/announcement/2022/suse-su-20221676-1/ Bulletin de sécurité SUSE suse-su-20221686-1 du 16 mai 2022 https://www.suse.com/support/update/announcement/2022/suse-su-20221686-1/ Bulletin de sécurité SUSE suse-su-20221687-1 du 16 mai 2022 https://www.suse.com/support/update/announcement/2022/suse-su-20221687-1/ Référence CVE CVE-2015-4142 https://www.cve.org/CVERecord?id=CVE-2015-4142 Référence CVE CVE-2018-25032 https://www.cve.org/CVERecord?id=CVE-2018-25032 Référence CVE CVE-2021-4136 https://www.cve.org/CVERecord?id=CVE-2021-4136 Référence CVE CVE-2021-4166 https://www.cve.org/CVERecord?id=CVE-2021-4166 Référence CVE CVE-2021-4173 https://www.cve.org/CVERecord?id=CVE-2021-4173 Référence CVE CVE-2021-4187 https://www.cve.org/CVERecord?id=CVE-2021-4187 Référence CVE CVE-2021-4192 https://www.cve.org/CVERecord?id=CVE-2021-4192 Référence CVE CVE-2021-4193 https://www.cve.org/CVERecord?id=CVE-2021-4193 Référence CVE CVE-2021-44224 https://www.cve.org/CVERecord?id=CVE-2021-44224 Référence CVE CVE-2021-44790 https://www.cve.org/CVERecord?id=CVE-2021-44790 Référence CVE CVE-2021-45444 https://www.cve.org/CVERecord?id=CVE-2021-45444 Référence CVE CVE-2021-46059 https://www.cve.org/CVERecord?id=CVE-2021-

Official advisory
CERT-FR · French · CERTFR-2022-AVI-466Multiples vulnérabilités dans les produits Apple

https://support.apple.com/fr-fr/HT213256 Bulletin de sécurité Apple HT213257 du 16 mai 2022 https://support.apple.com/fr-fr/HT213257 Bulletin de sécurité Apple HT213258 du 16 mai 2022 https://support.apple.com/fr-fr/HT213258 Bulletin de sécurité Apple HT213260 du 16 mai 2022 https://support.apple.com/fr-fr/HT213260 Bulletin de sécurité Apple HT213261 du 16 mai 2022 https://support.apple.com/fr-fr/HT213261 Référence CVE CVE-2015-4142 https://www.cve.org/CVERecord?id=CVE-2015-4142 Référence CVE CVE-2018-25032 https://www.cve.org/CVERecord?id=CVE-2018-25032 Référence CVE CVE-2021-4136 https://www.cve.org/CVERecord?id=CVE-2021-4136 Référence CVE CVE-2021-4166 https://www.cve.org/CVERecord?id=CVE-2021-4166 Référence CVE CVE-2021-4173 https://www.cve.org/CVERecord?id=CVE-2021-4173 Référence CVE CVE-2021-4187 https://www.cve.org/CVERecord?id=CVE-2021-4187 Référence CVE CVE-2021-4192 https://www.cve.org/CVERecord?id=CVE-2021-4192 Référence CVE CVE-2021-4193 https://www.cve.org/CVERecord?id=CVE-2021-4193 Référence CVE CVE-2021-44224 https://www.cve.org/CVERecord?id=CVE-2021-44224 Référence CVE CVE-2021-44790 https://www.cve.org/CVERecord?id=CVE-2021-44790 Référence CVE CVE-2021-45444 https://www.cve.org/CVERecord?id=CVE-2021-45444 Référence CVE CVE-2021-46059 https://www.cve.org/CVERecord?id=CVE-2021-

Official advisory
CERT-FR · French · CERTFR-2022-AVI-330Multiples vulnérabilités dans Stormshield Network Security

advisories.stormshield.eu/2022-008/ Référence CVE CVE-2021-3927 https://www.cve.org/CVERecord?id=CVE-2021-3927 Référence CVE CVE-2021-3928 https://www.cve.org/CVERecord?id=CVE-2021-3928 Référence CVE CVE-2021-3968 https://www.cve.org/CVERecord?id=CVE-2021-3968 Référence CVE CVE-2021-3974 https://www.cve.org/CVERecord?id=CVE-2021-3974 Référence CVE CVE-2021-3984 https://www.cve.org/CVERecord?id=CVE-2021-3984 Référence CVE CVE-2021-4019 https://www.cve.org/CVERecord?id=CVE-2021-4019 Référence CVE CVE-2021-4069 https://www.cve.org/CVERecord?id=CVE-2021-4069 Référence CVE CVE-2021-4136 https://www.cve.org/CVERecord?id=CVE-2021-4136 Référence CVE CVE-2021-4166 https://www.cve.org/CVERecord?id=CVE-2021-4166 Référence CVE CVE-2021-4173 https://www.cve.org/CVERecord?id=CVE-2021-4173 Référence CVE CVE-2021-4187 https://www.cve.org/CVERecord?id=CVE-2021-4187 Référence CVE CVE-2021-4192 https://www.cve.org/CVERecord?id=CVE-2021-4192 Référence CVE CVE-2021-4193 https://www.cve.org/CVERecord?id=CVE-2021-4193 Référence CVE CVE-2022-0128 https://www.cve.org/CVERecord?id=CVE-2022-0128 Référence CVE CVE-2022-0156 https://www.cve.org/CVERecord?id=CVE-2022-0156 Référence CVE CVE-2022-0158 https://www.cve.org/CVERecord?id=CVE-2022-0158 Référence CVE CVE-2022-0213 https://www.cve.org/CVERecord?id=CVE-2022-0213 Ré

Official advisory
CERT-FR · French · CERTFR-2022-AVI-243Multiples vulnérabilités dans les produits Apple

13191 Bulletin de sécurité Apple HT213193 du 14 mars 2022 https://support.apple.com/fr-fr/HT213193 Référence CVE CVE-2019-14379 https://www.cve.org/CVERecord?id=CVE-2019-14379 Référence CVE CVE-2021-22945 https://www.cve.org/CVERecord?id=CVE-2021-22945 Référence CVE CVE-2021-22946 https://www.cve.org/CVERecord?id=CVE-2021-22946 Référence CVE CVE-2021-22947 https://www.cve.org/CVERecord?id=CVE-2021-22947 Référence CVE CVE-2021-30918 https://www.cve.org/CVERecord?id=CVE-2021-30918 Référence CVE CVE-2021-36976 https://www.cve.org/CVERecord?id=CVE-2021-36976 Référence CVE CVE-2021-4136 https://www.cve.org/CVERecord?id=CVE-2021-4136 Référence CVE CVE-2021-4166 https://www.cve.org/CVERecord?id=CVE-2021-4166 Référence CVE CVE-2021-4173 https://www.cve.org/CVERecord?id=CVE-2021-4173 Référence CVE CVE-2021-4187 https://www.cve.org/CVERecord?id=CVE-2021-4187 Référence CVE CVE-2021-4192 https://www.cve.org/CVERecord?id=CVE-2021-4192 Référence CVE CVE-2021-4193 https://www.cve.org/CVERecord?id=CVE-2021-4193 Référence CVE CVE-2021-44228 https://www.cve.org/CVERecord?id=CVE-2021-44228 Référence CVE CVE-2021-46059 https://www.cve.org/CVERecord?id=CVE-2021-46059 Référence CVE CVE-2022-0128 https://www.cve.org/CVERecord?id=CVE-2022-0128 Référence CVE CVE-2022-0156 https://www.cve.org/CVERecord?id=CVE-2022-015

Official advisory
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
unspecified < 8.2
Fixed
An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
Action
Review the linked authoritative reference and apply the recorded fixed release appropriate to the affected product branch.
Workaround
No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04

Evidence and provenance

Published 25 Dec 2021 · Last source change 3 Aug 2024, 17:16 UTC · CWE-125 · Out-of-bounds Read

CVE recordCVE.org · 5.1
CVSS sourceNIST NVD
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2021-34032
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceCNA
NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates →

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
ENISA EUVD · EUVD-2021-34032↗Public exploit reference↗Patch or update reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2021-4166 · cve.blacktree.nl