CVE-2026-84520

criticalpriority · track · 10EPSS 0.004 · 38 %ileexploit · PoCDENLRUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

0.45% (38th) EPSS

CVSS 9.8 · critical

Is it mine?

14 products

Check your exposure

Who says so?

4 sources

fstec_bdu · cert_bund · ncsc_nl · nvd

EPSS · scored 2026-10-27

A buffer overflow was addressed with improved size validation. This issue is fixed in macOS Golden Gate 27. A local attacker may be able to cause unexpected system termination or corrupt kernel memory.

cvss

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

9.8

010

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

v3.19.8criticalAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondaryexploitability 3.9 · impact 5.9

v3.19.3criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Psecondary · CVSS-BT (t0sche)

ssvc

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

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

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-120USCWE-120US

exploits (1)

Public proof-of-concept and weaponised exploit code.

csrXamfi/CVE-2026-84520AppleFDEKeyStore pocPoC · 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 Inc. MacOS≤ 27fstec_bduRU
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 macos< 27.0nvdUScpe: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.

also known as (1)

Other names and identifiers for this entity.

BDU:2026-16179 fstec_bdu

sources

Which sources assert this record, and when.

fstec_bdu cert_bund ncsc_nl nvd NVD CVE.org MITRE

published 2026-09-14modified 2026-10-12

references (1) nvd

External citations — patches, advisories, analysis.

https://support.apple.com/en-us/149035Vendor AdvisoryRelease Notes

scry

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