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CVE-2021-1883

MEDIUM

5.5

CVSS Score

Published: September 8, 2021 at 02:49 PM UTC

Updated: June 17, 2026 at 03:32 AM UTC

5 products affected across 1 vendormacOSiPhone OSiPadOS

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Severity

MEDIUM5.5

Exploit prediction

EPSS 2%

Description

This issue was addressed with improved checks. This issue is fixed in Security Update 2021-004 Mojave, iOS 14.5 and iPadOS 14.5, watchOS 7.4, Security Update 2021-003 Catalina, tvOS 14.5, macOS Big Sur 11.3. Processing maliciously crafted server messages may lead to heap corruption.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

iPadOS · Apple

95%

v < 14.5

Affected range stops below 14.5, so it looks safe — our inference, not a vendor statement

iPhone OS · Apple

95%

v < 14.5

Affected range stops below 14.5, so it looks safe — our inference, not a vendor statement

95%

v < 11.3v < 202110.14 ≤ v ≤ 10.14.510.15 ≤ v ≤ 10.15.511.0 ≤ v < 11.310.14.6 10.14.6 security_update_2019-001 10.14.6 security_update_2019-002 10.14.6 security_update_2019-004 10.14.6 security_update_2019-005 10.14.6 security_update_2019-006 10.14.6 security_update_2019-007 10.14.6 security_update_2020-001 10.14.6 security_update_2020-002 10.14.6 security_update_2020-003 10.14.6 security_update_2020-004 10.14.6 security_update_2020-005 10.14.6 security_update_2020-006 10.14.6 security_update_2020-007 10.14.6 security_update_2021-001 10.14.6 security_update_2021-002 10.14.6 security_update_2021-003 10.14.6 supplemental_update 10.14.6 supplemental_update_2 10.15.6 10.15.6 supplemental_update 10.15.7 10.15.7 security_update_2020 10.15.7 security_update_2020-001 10.15.7 security_update_2020-005 10.15.7 security_update_2020-007 10.15.7 security_update_2021-001 10.15.7 security_update_2021-002 10.15.7 supplemental_update

Affected range stops below 11.3, so it looks safe — our inference, not a vendor statement

Affected range stops below 2021, so it looks safe — our inference, not a vendor statement

95%

v < 14.5

Affected range stops below 14.5, so it looks safe — our inference, not a vendor statement

watchOS · Apple

95%

v < 7.4

Affected range stops below 7.4, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (6)

x_refsource_MISCVendor Advisory

Source: [email protected]

https://support.apple.com/en-us/HT212317

x_refsource_MISCVendor Advisory

Source: [email protected]

https://support.apple.com/en-us/HT212323

x_refsource_MISCVendor Advisory

Source: [email protected]

https://support.apple.com/en-us/HT212324

x_refsource_MISCVendor Advisory

Source: [email protected]

https://support.apple.com/en-us/HT212325

x_refsource_MISCVendor Advisory

Source: [email protected]

https://support.apple.com/en-us/HT212530

x_refsource_MISCVendor Advisory

Source: [email protected]

https://support.apple.com/en-us/HT212531

CVSS

5.5MEDIUM[email protected]

Attack Vector: LOCAL
Complexity: LOW
Privileges: NONE
User Interaction: REQUIRED
Scope: UNCHANGED
Confidentiality: NONE
Integrity: HIGH
Availability: NONE

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-787

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