CVE-2021-1821

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Published Oct 28, 2021 CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed

Description

A logic issue was addressed with improved state management. This issue is fixed in watchOS 7.6, macOS Big Sur 11.5. Visiting a maliciously crafted webpage may lead to a system denial of service.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Apple

macOS

affected

Version	Status	Constraints
`unspecified`	affected	< 11.5

Apple

macOS

affected

Version	Status	Constraints
`unspecified`	affected	< 7.6

Configuration 1 [-]

OR	cpe:2.3:o:apple:macos::::::::
	cpe:2.3:o:apple:watchos::::::::

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source	ID	Title
EUVD	EUVD-2021-7285	A logic issue was addressed with improved state management. This issue is fixed in watchOS 7.6, macOS Big Sur 11.5. Visiting a maliciously crafted webpage may lead to a system denial of service.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction Required

No CVSS v3.0

Access Vector Network

Access Complexity Medium

Authentication None

Confidentiality Impact None

Integrity Impact None

Availability Impact Complete

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.658% probability within 30 days)

Key SSVC decision points have not yet been added.

References

Link	Providers
https://support.apple.com/en-us/HT212602
https://support.apple.com/en-us/HT212605

History

No history.

Subscriptions

Apple Macos Watchos

Weaknesses

NVD-CWE-noinfo

Sources

CVE record Updated: Aug 3, 2024, 4:25 PM

Status: PUBLISHED
Assigner: apple
Published: Oct 28, 2021, 6:16 PM
Updated: Aug 3, 2024, 4:25 PM
Reserved: Dec 8, 2020, 12:00 AM

View source JSON

Vulnrichment No data

No data.

NVD Updated: Jun 17, 2026, 3:32 AM

Status: Modified
Published: Oct 28, 2021, 7:15 PM
Modified: Jun 17, 2026, 3:32 AM

View source JSON

Red Hat No data

No data.

OpenCVE enrichment No data

No data.

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