CVE-2021-30937

highpriority · attend · 47EPSS 0.173 · 97 %ileexploit · PoCDEEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

17.3% (97th) EPSS

CVSS 9.3 · high

Is it mine?

25 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-26

A memory corruption vulnerability was addressed with improved locking. This issue is fixed in macOS Big Sur 11.6.2, tvOS 15.2, macOS Monterey 12.1, Security Update 2021-008 Catalina, iOS 15.2 and iPadOS 15.2, watchOS 8.3. A malicious application may be able to execute arbitrary code with kernel privileges.

cvss

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

9.3

010

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

v2.09.3highAV:N/AC:M/Au:N/C:C/I:C/A:Cprimary · NVD / NIST USexploitability 8.6 · impact 10

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 5.9

v3.17.4highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:Psecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-787USprimary

exploits (1)

Public proof-of-concept and weaponised exploit code.

realrodri/ExploiteameEstaCVE-2021-30937 vulnerability checking appPoC · poc_in_github

affected products (25)

Products and version ranges known to be affected.

Apple iOS <15.2all versionscert_bundDE
Apple iPadall versionscert_bundDEcpe:/h:apple:ipad:-
Apple iPadOS <15.2all versionscert_bundDE
Apple iPhoneall versionscert_bundDEcpe:/h:apple:iphone:-
Apple macOS Big Sur <11.6.2all versionscert_bundDE
Apple macOS Catalinaall versionscert_bundDEcpe:/o:apple:mac_os:catalina
Apple macOS Monterey <12.1all versionscert_bundDE
Apple IOS< 15.2cert_bundDE
Apple iPadOS< 15.2cert_bundDE
Apple macOS≤ Big Sur <11.6.2cert_bundDE
Apple macOS≤ Monterey <12.1cert_bundDE
Apple iOS and iPadOSunspecified → 15.2enisa_euvdEU
Apple macOSunspecified → 11.6enisa_euvdEU
Apple macOSunspecified → 12.1enisa_euvdEU
Apple macOSunspecified → 15.2enisa_euvdEU
Apple macOSunspecified → 2021enisa_euvdEU
Apple watchOSunspecified → 8.3enisa_euvdEU
apple ipados< 15.2nvdUScpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
apple iphone os< 15.2nvdUScpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
apple mac os x10.15 → 10.15.7nvdUScpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*

showing 20 of 25

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2022-0489Apple iOS: Mehrere SchwachstellenDeutsch2021-12-13csaf · cert_bundDE
Ein entfernter, anonymer, physischer oder lokaler Angreifer kann mehrere Schwachstellen in Apple iOS, Apple iPadOS, Apple iPhone und Apple iPad ausnutzen, um beliebigen Programmcode auszuführen, beliebigen Programmcode mit Kernel-Privilegien auszuführen, seine Privilegien zu erweitern, vertrauliche Informationen offenzulegen, einen Denial-of-Service-Zustand zu verursachen, Sicherheitsmaßnahmen zu umgehen und Dateien zu manipulieren.
WID-SEC-W-2026-0631Apple macOS: Mehrere SchwachstellenDeutsch2021-12-13csaf · cert_bundDE
Ein entfernter, anonymer oder lokaler Angreifer kann mehrere Schwachstellen in Apple macOS ausnutzen, um beliebigen Programmcode auszuführen, beliebigen Programmcode mit Kernel-Privilegien auszuführen, seine Privilegien zu erweitern, vertrauliche Informationen offenzulegen, einen Denial-of-Service-Zustand zu verursachen und Sicherheitsmaßnahmen zu umgehen.

also known as (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd NVD CVE.org MITRE

published 2021-08-24modified 2026-06-17

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Related entries.

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+16094 more

references (25)

External citations — patches, advisories, analysis.

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