Is CVE-2021-30983 in the CISA KEV catalog?

Yes. CVE-2021-30983 is on the CISA Known Exploited Vulnerabilities list, added 2022-06-27.

What is the CVSS severity of CVE-2021-30983?

CVE-2021-30983 has a CVSS v3 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2021-30983?

CVE-2021-30983 has an EPSS score of 2.93% (85th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2021-30983

HIGHCISA KEVEPSS 85th pctl

7.8

CVSS v3

NVD

Description

A buffer overflow issue was addressed with improved memory handling. This issue is fixed in iOS 15.2 and iPadOS 15.2. An application may be able to execute arbitrary code with kernel privileges.

CWE-120

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

2.93%probability of exploitation in 30 days

85thpercentile

Elevated risk: more likely to be exploited than 85% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

Apple iOS and iPadOS Buffer Overflow Vulnerability

Apple iOS and iPadOS contain a buffer overflow vulnerability that could allow an application to execute code with kernel privileges.

Apply updates per vendor instructions.

Remediation due: 2022-07-18

References

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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 2025-10-23.