Is CVE-2021-1857 in the CISA KEV catalog?

No. CVE-2021-1857 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-1857?

CVE-2021-1857 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2021-1857?

CVE-2021-1857 has an EPSS score of 1.22% (65th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-1857?

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

CVE & CISA-KEV Catalog

CVE-2021-1857

MEDIUM

6.5

CVSS v3

NVD

Description

A memory initialization issue was addressed with improved memory handling. 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 maliciously crafted web content may disclose sensitive user information.

CWE-665

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

1.22%probability of exploitation in 30 days

65thpercentile

Moderate risk: more likely to be exploited than 65% of all known CVEs.

References

Vendor Advisory8

Related Vulnerabilities

Other CWE-665 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2022-0847	High	7.8	88%	KEV	Fix
CVE-2022-22719	High	7.5	70%	-	Fix
CVE-2020-28019	High	7.5	61%	-	Fix
CVE-2022-46164	Critical	9.4	49%	-	Fix
CVE-2022-37128	Critical	9.8	21%	-	-
CVE-2019-14271	Critical	9.8	19%	-	Fix

Embed a live status badge for CVE-2021-1857

Markdown

[![CVE-2021-1857](https://tridentstack.com/cve/badge/CVE-2021-1857.svg)](https://tridentstack.com/cve/CVE-2021-1857)

HTML

<a href="https://tridentstack.com/cve/CVE-2021-1857"><img src="https://tridentstack.com/cve/badge/CVE-2021-1857.svg" alt="CVE-2021-1857"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

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.