CVE-2020-3911

highpriority · track · 40EPSS 0.016 · 76 %ileEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

1.64% (76th) EPSS

CVSS 7.5 · high

Is it mine?

22 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-28

A buffer overflow was addressed with improved bounds checking. This issue is fixed in iOS 13.4 and iPadOS 13.4, macOS Catalina 10.15.4, tvOS 13.4, watchOS 6.2, iTunes for Windows 12.10.5, iCloud for Windows 10.9.3, iCloud for Windows 7.18. Multiple issues in libxml2.

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⚠ sources disagree · high–critical · 7.5–9.8

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 10 · impact 6.4

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

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

v3.19criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-120USprimaryCWE-120US

affected products (22)

Products and version ranges known to be affected.

Apple IOSunspecified → iOS 13.4 and iPadOS 13.4enisa_euvdEU
Apple iCloud for Windowsunspecified → iCloud for Windows 10.9.3enisa_euvdEU
Apple iCloud for Windows (Legacy)unspecified → iCloud for Windows 7.18enisa_euvdEU
Apple iTunes for Windowsunspecified → iTunes for Windows 12.10.5enisa_euvdEU
Apple macOSunspecified → macOS Catalina 10.15.4enisa_euvdEU
Apple tvOSunspecified → tvOS 13.4enisa_euvdEU
Apple watchOSunspecified → watchOS 6.2enisa_euvdEU
Apple Inc. MacOS≤ 10.15.4fstec_bduRU
Apple Inc. iCloud≤ 7.18fstec_bduRU
Apple Inc. iCloud≤ 10.9.3fstec_bduRU
Apple Inc. iOS≤ 13.4fstec_bduRU
Apple Inc. iPadOS≤ 13.4fstec_bduRU
Apple Inc. iTunes≤ 12.10.5fstec_bduRU
Apple Inc. tvOS≤ 13.4fstec_bduRU
Apple Inc. watchOS≤ 6.2fstec_bduRU
apple icloud< 10.9.3nvdUScpe:2.3:a:apple:icloud:*:*:*:*:*:*:*:*
apple ipados< 13.4nvdUScpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
apple iphone os< 13.4nvdUScpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
apple itunes< 12.10.5nvdUScpe:2.3:a:apple:itunes:*:*:*:*:*:*:*:*
apple mac os x< 10.15.4nvdUScpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*

showing 20 of 22

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 2020-04-01modified 2026-06-17

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+5664 more

references (25)

External citations — patches, advisories, analysis.

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