CVE-2020-9819

mediumpriority · act · 90OT risk · criticalKEV · exploitedEPSS 0.022 · 83 %ileEURUUS

grimoire priorityP0 · Act now

Exploitable?

Yes · in the wild

CISA KEV

Likely / severe?

2.23% (83rd) EPSS

CVSS 4.3 · medium

Is it mine?

14 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 2026-10-26

Apple iOS, iPadOS, and watchOS Memory Corruption Vulnerability

A memory consumption issue was addressed with improved memory handling. This issue is fixed in iOS 13.5 and iPadOS 13.5, iOS 12.4.7, watchOS 6.2.5, watchOS 5.3.7. Processing a maliciously crafted mail message may lead to heap corruption.

cvss

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

4.3

010

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

v2.04.3mediumAV:N/AC:M/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 8.6 · impact 2.9

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:Lprimary · NVD / NIST USexploitability 2.8 · impact 1.4

v3.14.3mediumAV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:Lsecondary · FSTEC (BDU) RU

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:Lsecondary · ENISA EU

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:Lsecondaryexploitability 2.8 · impact 1.4

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:Hsecondary · CVSS-BT (t0sche)

ssvc

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

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

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-787USprimaryCWE-787US

affected products (14)

Products and version ranges known to be affected.

Apple IOSunspecified → iOS 13.5 and iPadOS 13.5enisa_euvdEU
Apple iOS-1unspecified → iOS 12.4.7enisa_euvdEU
Apple watchOSunspecified → watchOS 6.2.5enisa_euvdEU
Apple watchOS-1unspecified → watchOS 5.3.7enisa_euvdEU
Apple Inc. iOS≤ 12.4.7fstec_bduRU
Apple Inc. iOS13.0 → 13.5fstec_bduRU
Apple Inc. iPadOS≤ 13.5fstec_bduRU
Apple Inc. watchOS≤ 5.3.7fstec_bduRU
Apple Inc. watchOS6.2.0 → 6.2.5fstec_bduRU
apple ipados< 13.5nvdUScpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
apple iphone os< 12.4.7nvdUScpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
apple iphone os13.0 → 13.5nvdUScpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
apple watchos< 5.3.7nvdUScpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*
apple watchos6.0.0 → 6.2.5nvdUScpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*

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 2020-06-09modified 2026-06-17

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+16091 more

references (20)

External citations — patches, advisories, analysis.

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