CVE-2026-84543

highpriority · track · 10EPSS 0.004 · 37 %ileexploit · PoCDENLUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

0.43% (37th) EPSS

CVSS 7.5 · high

Is it mine?

14 products

Check your exposure

Who says so?

3 sources

cert_bund · ncsc_nl · nvd

EPSS · scored 2026-10-27

An out-of-bounds access issue was addressed with improved bounds checking. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. Connecting to a malicious SMB server may cause unexpected system termination or corrupt kernel memory.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nsecondaryexploitability 3.9 · impact 3.6

v3.17.1highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:Psecondary · CVSS-BT (t0sche)

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nsecondary · CISA ADP (Vulnrichment)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-125USCWE-125US

exploits (1)

Public proof-of-concept and weaponised exploit code.

petermalone/CVE-2026-84543Technical disclosure and PoC for CVE-2026-84543, a macOS SMB kernel vulnerabilityPoC · poc_in_github

affected products (14)

Products and version ranges known to be affected.

Apple IOS< 26.7cert_bundDE
Apple IOS< 27cert_bundDE
Apple Safari< 27cert_bundDE
Apple iPadOS< 26.7cert_bundDE
Apple iPadOS< 27cert_bundDE
Apple macOS≤ Tahoe <26.7cert_bundDE
Apple macOS≤ Golden Gate <27cert_bundDE
Apple macOS≤ Sequoia <15.8cert_bundDE
Apple macOS≤ vers:unknown/*ncsc_nlNL
Apple macOS Golden Gate≤ vers:unknown/*ncsc_nlNL
Apple macOS Sequoia≤ vers:unknown/*ncsc_nlNL
Apple macOS Tahoe≤ vers:unknown/*ncsc_nlNL
apple macos15.0 → 15.8nvdUScpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
apple macos26.0 → 26.7nvdUScpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*

advisories (2)

Vendor and ecosystem advisories describing this.

NCSC-2026-0371Kwetsbaarheden verholpen in Apple macOS en Samba door Apple en SambaNL2026-09-15csaf · ncsc_nlNL
Apple heeft meerdere kwetsbaarheden verholpen in macOS (Specifiek voor Golden Gate 27, Sequoia 15.8, Tahoe 26.7).
WID-SEC-W-2026-3352Apple iOS, iPadOS, macOS Tahoe, macOS Golden Gate, macOS Sequoia und Safari: Mehrere SchwachstellenDeutsch2026-09-14csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Apple iOS, iPadOS, macOS Tahoe, macOS Golden Gate, macOS Sequoia and Safari ausnutzen,, um beliebigen Code mit Root- oder Kernel-Rechten auszuführen, Berechtigungen zu erweitern, Sicherheitsmaßnahmen zu umgehen, auf Daten zuzugreifen, diese zu manipulieren oder offenzulegen oder Denial-of-Service-Zustände herbeizuführen.

sources

Which sources assert this record, and when.

cert_bund ncsc_nl nvd NVD CVE.org MITRE

published 2026-09-14modified 2026-09-16

references (3) nvd

External citations — patches, advisories, analysis.

https://support.apple.com/en-us/149035Release NotesVendor Advisory
https://support.apple.com/en-us/149042Release NotesVendor Advisory
https://support.apple.com/en-us/149043Release NotesVendor Advisory

scry

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