CVE-2020-27950

highpriority · act · 90OT risk · criticalKEV · exploitedEPSS 0.165 · 97 %ileexploit · PoCEURUUS

grimoire priorityP0 · Act now

Exploitable?

Yes · in the wild

CISA KEV · 2 exploits · PoC

Likely / severe?

16.5% (97th) EPSS

CVSS 7.1 · high

Is it mine?

24 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

added 2021-11-03remediate by 2022-05-03

required action Apply updates per vendor instructions.

EPSS · scored 2026-10-27

Apple Multiple Products Memory Initialization Vulnerability

A memory initialization issue was addressed. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.1, iOS 12.4.9, watchOS 6.2.9, Security Update 2020-006 High Sierra, Security Update 2020-006 Mojave, iOS 14.2 and iPadOS 14.2, watchOS 5.3.9, macOS Catalina 10.15.7 Supplemental Update, macOS Catalina 10.15.7 Update. A malicious application may be able to disclose kernel memory.

cvss

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

7.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.5–7.1

v2.07.1highAV:N/AC:M/Au:N/C:C/I:N/A:Nprimary · NVD / NIST USexploitability 8.6 · impact 6.9

v3.15.5mediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 1.8 · impact 3.6

v3.15.5mediumAV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:Nsecondary · FSTEC (BDU) RU

v3.15.5mediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:Nsecondary · ENISA EU

v3.15.5mediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:Nsecondaryexploitability 1.8 · impact 3.6

v3.15.5mediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:Hsecondary · CVSS-BT (t0sche)

ssvc

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

Exploitation: active · Automatable: no · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-665USprimaryCWE-665US

exploits (2)

Public proof-of-concept and weaponised exploit code.

affected products (24)

Products and version ranges known to be affected.

Apple iOS and iPadOSunspecified → 14.2enisa_euvdEU
Apple macOSunspecified → 10.15enisa_euvdEU
Apple macOSunspecified → 11.0enisa_euvdEU
Apple macOSunspecified → 12.4enisa_euvdEU
Apple macOSunspecified → 2020enisa_euvdEU
Apple macOSunspecified → 5.3enisa_euvdEU
Apple macOSunspecified → 6.2enisa_euvdEU
Apple watchOSunspecified → 7.1enisa_euvdEU
Apple Inc. MacOS≤ 10.15.7fstec_bduRU
Apple Inc. MacOS11.0 → 11.0.1fstec_bduRU
Apple Inc. iOS≤ 12.4.9fstec_bduRU
Apple Inc. iOS14.0 → 14.2fstec_bduRU
Apple Inc. iPadOS≤ 14.2fstec_bduRU
Apple Inc. watchOS≤ 5.3.9fstec_bduRU
Apple Inc. watchOS6.0 → 6.2.9fstec_bduRU
Apple Inc. watchOS7.0 → 7.1fstec_bduRU
apple ipados< 14.2nvdUScpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
apple iphone os< 12.4.9nvdUScpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
apple iphone os14.0 → 14.2nvdUScpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
apple macos< 10.15.7nvdUScpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*

showing 20 of 24

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd NVD CVE.org MITRE

published 2020-12-08modified 2026-06-17

related (659)

Related entries.

ID	severity	EPSS	exploitable	published
CVE-2024-50302US	medium5.5OT critical	0.81% (57th)	KEV	2024-11-19
In the Linux kernel, the following vulnerability has been resolved: HID: core: zero-initialize the report buffer Since the report buffer is used by all kinds of drivers in variou…
CVE-2023-49105US	critical9.8OT critical	43.2% (99th)	KEV	2023-11-21
An issue was discovered in ownCloud owncloud/core before 10.13.1. An attacker can access, modify, or delete any file without authentication if the username of a victim is known, an…
CVE-2022-0847US	high7.8OT critical	92.8% (100th)	KEV	2022-03-10
A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe and push_pipe functions in the Linux ker…
CVE-2013-1675US	medium6.5OT critical	6.70% (94th)	KEV	2013-05-16
Mozilla Firefox before 21.0, Firefox ESR 17.x before 17.0.6, Thunderbird before 17.0.6, and Thunderbird ESR 17.x before 17.0.6 do not properly initialize data structures for the ns…
CVE-2022-46164US	critical9.8	47.4% (99th)	Exploit	2022-12-05
NodeBB is an open source Node.js based forum software. Due to a plain object with a prototype being used in socket.io message handling a specially crafted payload can be used to im…

+654 more

references (39)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan