Is CVE-2021-1757 in the CISA KEV catalog?

No. CVE-2021-1757 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-1757?

CVE-2021-1757 has a CVSS v3 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2021-1757?

CVE-2021-1757 has an EPSS score of 0.33% (25th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-1757?

Upgrade ipados to 14.4 or later. Fixes are available for 6 affected products.

CVE & CISA-KEV Catalog

CVE-2021-1757

HIGH

7.8

CVSS v3

NVD

Description

An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, watchOS 7.3, tvOS 14.4, iOS 14.4 and iPadOS 14.4. A local attacker may be able to elevate their privileges.

CWE-125Out-of-bounds Read

How to fix

Remediation Available

ipadosNVD

Affected:< 14.4Fixed in:14.4CVE-2021-1757derived from NVD

iphone osNVD

Affected:< 14.4Fixed in:14.4CVE-2021-1757derived from NVD

mac os xNVD

Affected:>= 10.15, < 10.15.7Fixed in:10.15.7CVE-2021-1757derived from NVD

macosNVD

Affected:>= 11.0, < 11.2Fixed in:11.2CVE-2021-1757derived from NVD

tvosNVD

Affected:< 14.4Fixed in:14.4CVE-2021-1757derived from NVD

watchosNVD

Affected:< 7.3Fixed in:7.3CVE-2021-1757derived from NVD

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 VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.33%probability of exploitation in 30 days

25thpercentile

Low risk: more likely to be exploited than 25% of all known CVEs.

References

Vendor Advisory4

Related Vulnerabilities

Other CWE-125 (Out-of-bounds Read) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2014-0160	High	7.5	100%	KEV	Fix
CVE-2025-5777	High	7.5	100%	KEV + Ransom	Fix
CVE-2021-4034	High	7.8	95%	KEV	Fix
CVE-2023-21769	High	7.5	92%	-	Fix
CVE-2023-49285	High	8.6	89%	-	Fix
CVE-2020-8794	Critical	9.8	89%	-	Fix

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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.