Is CVE-2021-1811 in the CISA KEV catalog?

No. CVE-2021-1811 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-1811?

CVE-2021-1811 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2021-1811?

CVE-2021-1811 has an EPSS score of 1.67% (74th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-1811?

Upgrade iCloud (Legacy) to 12.3 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2021-1811

MEDIUMEPSS 74th pctl

6.5

CVSS v3

NVD

Description

A logic issue was addressed with improved state management. This issue is fixed in iTunes 12.11.3 for Windows, Security Update 2021-002 Catalina, Security Update 2021-003 Mojave, iCloud for Windows 12.3, macOS Big Sur 11.3, watchOS 7.4, tvOS 14.5, iOS 14.5 and iPadOS 14.5. Processing a maliciously crafted font may result in the disclosure of process memory.

How to fix

Remediation Available

iCloud (Legacy)Windows application

Affected:12.3Fixed in:12.3Apple Inc.

iTunesWindows application

Affected:12.11.3Fixed in:12.11.3Apple Inc.

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Exploit Intelligence

1.67%probability of exploitation in 30 days

74thpercentile

Elevated risk: more likely to be exploited than 74% of all known CVEs.

References

Vendor Advisory8

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.