CVE-2026-39875: A permissions issue was addressed with additional restrictions

Recommended actionWithin 7 days

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

Mitigation available

What, why and how

A permissions issue was addressed with additional restrictions. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. A malicious app may be able to gain root privileges.

What

Why

During installation, installed file permissions are set to allow anyone to modify those files.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

Why

During installation, installed file permissions are set to allow anyone to modify those files.

How

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

CISA Vulnrichment records proof-of-concept exploitation in its SSVC data. BlackTree has not independently executed or validated exploit material.

Likely attack path: local access → Incorrect Default Permissions → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface: Local
Privileges required: Low: a basic authenticated account is required
User interaction: None
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-276 ↗
CWE-276: Incorrect Default Permissions. During installation, installed file permissions are set to allow anyone to modify those files.
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:L/UI:N/S:U/C:H/I:H/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.PRLowPrivileges required: The attacker needs basic user-level privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.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.

CWE-276Public exploit reference

Official authority intelligence

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

ENISA EUVD · EUVD-2026-49561Official EUVD mapping

0 linked advisory records.

Official EUVD record ↗

BSI · German · WID-SEC-2026-2543Apple macOS (Tahoe, Sonoma und Sequoia): Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Apple macOS Tahoe, Sonoma und Sequoia ausnutzen, um seine Privilegien zu erhöhen, um beliebigen Programmcode auszuführen, um einen Denial of Service Angriff durchzuführen, um Informationen offenzulegen, um Dateien zu manipulieren, und um Sicherheitsvorkehrungen zu umgehen.

Official advisory ↗

Cyber Security Agency of Singapore · English · CSA-SB-20260729Security Bulletin 29 Jul 2026

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 29 Jul 2026, published on 29 July 2026. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗

CERT-FR · French · CERTFR-2026-AVI-0938Multiples vulnérabilités dans les produits Apple

ecord?id=CVE-2026-28981 Référence CVE CVE-2026-28982 https://www.cve.org/CVERecord?id=CVE-2026-28982 Référence CVE CVE-2026-28983 https://www.cve.org/CVERecord?id=CVE-2026-28983 Référence CVE CVE-2026-3783 https://www.cve.org/CVERecord?id=CVE-2026-3783 Référence CVE CVE-2026-3784 https://www.cve.org/CVERecord?id=CVE-2026-3784 Référence CVE CVE-2026-39868 https://www.cve.org/CVERecord?id=CVE-2026-39868 Référence CVE CVE-2026-39872 https://www.cve.org/CVERecord?id=CVE-2026-39872 Référence CVE CVE-2026-39873 https://www.cve.org/CVERecord?id=CVE-2026-39873 Référence CVE CVE-2026-39874 https://www.cve.org/CVERecord?id=CVE-2026-39874 Référence CVE CVE-2026-39875 https://www.cve.org/CVERecord?id=CVE-2026-39875 Référence CVE CVE-2026-39877 https://www.cve.org/CVERecord?id=CVE-2026-39877 Référence CVE CVE-2026-43653 https://www.cve.org/CVERecord?id=CVE-2026-43653 Référence CVE CVE-2026-43661 https://www.cve.org/CVERecord?id=CVE-2026-43661 Référence CVE CVE-2026-43663 https://www.cve.org/CVERecord?id=CVE-2026-43663 Référence CVE CVE-2026-43665 https://www.cve.org/CVERecord?id=CVE-2026-43665 Référence CVE CVE-2026-43672 https://www.cve.org/CVERecord?id=CVE-2026-43672 Référence CVE CVE-2026-43673 https://www.cve.org/CVERecord?id=CVE-2026-43673 Référence CVE CVE-2026-43676 https://www.cve.org/CVERecord?id=

Official advisory ↗

CSIRT Italia · Italian · aggiornamenti-di-sicurezza-apple-15Aggiornamenti di sicurezza Apple

finestra - - CVE-2026-43699 : apre una nuova finestra - - CVE-2026-43698 : apre una nuova finestra - - CVE-2026-43694 : apre una nuova finestra - - CVE-2026-43693 : apre una nuova finestra - - CVE-2026-43682 : apre una nuova finestra Presente - CVE-2026-43681 : apre una nuova finestra - - CVE-2026-43676 : apre una nuova finestra - - CVE-2026-43673 : apre una nuova finestra - - CVE-2026-43672 : apre una nuova finestra - - CVE-2026-43665 : apre una nuova finestra - - CVE-2026-43663 : apre una nuova finestra - - CVE-2026-43661 : apre una nuova finestra - - CVE-2026-43653 : apre una nuova finestra - - CVE-2026-39877 : apre una nuova finestra - - CVE-2026-39875 : apre una nuova finestra - - CVE-2026-39874 : apre una nuova finestra - - CVE-2026-39873 : apre una nuova finestra - - CVE-2026-39872 : apre una nuova finestra - - CVE-2026-39868 : apre una nuova finestra - - CVE-2026-28983 : apre una nuova finestra - - CVE-2026-28982 : apre una nuova finestra - - CVE-2026-28981 : apre una nuova finestra - - CVE-2026-28979 : apre una nuova finestra - - CVE-2026-28973 : apre una nuova finestra - - CVE-2026-28961 : apre una nuova finestra - - CVE-2026-28945 : apre una nuova finestra - - CVE-2026-28936 : apre una nuova finestra - - CVE-2026-28932 : apre una nuova finestra - - CVE-2026-28931 : apre una nuova fi

Official advisory ↗

JVN iPedia · Japanese · JVNDB-2026-026064アップルのmacOSにおける不適切なデフォルトパーミッションに関する脆弱性

追加の制限により権限の問題に対処されました。この問題は macOS Sequoia 15.7.8、macOS Sonoma 14.8.8、macOS Tahoe 26.6 で修正されています。悪意のあるアプリがルート権限を取得する可能性があります。

Official advisory ↗

NCSC-NL · Dutch · NCSC-2026-0267Kwetsbaarheden verholpen in Apple MacOS

A permissions vulnerability allowing malicious applications to gain root privileges has been addressed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, and macOS Tahoe 26.6 through enhanced restrictions.

Official advisory ↗

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.: Mitigation available
Affected: macOS: < 14.8.8, < 15.7.8, < 26.6
Fixed: No fixed version is explicitly recorded in the structured CVE data.
Action: In linea con le dichiarazioni del vendor, si raccomanda di applicare le patch seguendo le indicazioni riportate nei bollettini di sicurezza, disponibili nella sezione Riferimenti.
Workaround: No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.

Official vendor articles3 stored documents

Linked articles are downloaded and versioned as source evidence. A CVE mention or approved update relationship does not, by itself, verify a fix for every product branch.

About the security content of macOS Tahoe 26.6 - Apple Support →Original publisher ↗Searchable text snapshot · Captured 26 Sep 2026Apple Store Mac iPad iPhone Watch Vision AirPods TV & Home Entertainment Accessories Support 0 + "},{"name":"compact","assetInline":" "}],"analyticsAttributes":[{"name":"data-analytics-title","value":"apple home"}]},{"id":"ad4a2a26eb4836393385e9f6c61b526b4a3cb31409c5ed8730ce7a704dd7132f","name":"store","te
About the security content of macOS Sequoia 15.7.8 - Apple Support →Original publisher ↗Searchable text snapshot · Captured 26 Sep 2026Apple Store Mac iPad iPhone Watch Vision AirPods TV & Home Entertainment Accessories Support 0 + "},{"name":"compact","assetInline":" "}],"analyticsAttributes":[{"name":"data-analytics-title","value":"apple home"}]},{"id":"ad4a2a26eb4836393385e9f6c61b526b4a3cb31409c5ed8730ce7a704dd7132f","name":"store","te
About the security content of macOS Sonoma 14.8.8 - Apple Support →Original publisher ↗Searchable text snapshot · Captured 26 Sep 2026Apple Store Mac iPad iPhone Watch Vision AirPods TV & Home Entertainment Accessories Support 0 + "},{"name":"compact","assetInline":" "}],"analyticsAttributes":[{"name":"data-analytics-title","value":"apple home"}]},{"id":"ad4a2a26eb4836393385e9f6c61b526b4a3cb31409c5ed8730ce7a704dd7132f","name":"store","te

Evidence and provenance

Published 27 Jul 2026 · Last source change 5 Aug 2026, 13:44 UTC · CWE-276 · Incorrect Default Permissions

CVE recordCVE.org · 5.2

CVSS sourceCISA ADP

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-2026-49561

Product sourceCNA

Remediation sourceCVE/CNA references

CWE sourceCISA ADP

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 ↗

28 Jul 2026, 14:03 UTC
Remediation statusRemediation status changed from Awaiting fix to Mitigation available.
Before
Awaiting fix
After
Mitigation available
CSIRT Italia ↗

2026-07-27CVE published

2026-07-28Remediation guidance recorded

ENISA EUVD · EUVD-2026-49561↗CSIRT Italia remediation guidance↗CISA Vulnrichment SSVC evidence↗CVE authority or vendor reference↗Vendor advisory↗Vendor advisory↗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.

A permissions issue was addressed with additional restrictions

Published severity in operational context

Evidence used

Compensating controls

Verification

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

ENISA European Vulnerability Database

EUVD-2026-49561

What, why and how

Exploit reality and attack path

Official authority intelligence

Patch and workaround

Evidence and provenance

What changed after publication