Is CVE-2021-31010 in the CISA KEV catalog?

Yes. CVE-2021-31010 is on the CISA Known Exploited Vulnerabilities list, added 2022-08-25.

What is the CVSS severity of CVE-2021-31010?

CVE-2021-31010 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2021-31010?

CVE-2021-31010 has an EPSS score of 3.67% (88th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2021-31010

HIGHCISA KEVEPSS 88th pctl

7.5

CVSS v3

NVD

Description

A deserialization issue was addressed through improved validation. This issue is fixed in Security Update 2021-005 Catalina, iOS 12.5.5, iOS 14.8 and iPadOS 14.8, macOS Big Sur 11.6, watchOS 7.6.2. A sandboxed process may be able to circumvent sandbox restrictions. Apple was aware of a report that this issue may have been actively exploited at the time of release..

CWE-502Deserialization of Untrusted Data

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

3.67%probability of exploitation in 30 days

88thpercentile

Elevated risk: more likely to be exploited than 88% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

Apple iOS, macOS, watchOS Sandbox Bypass Vulnerability

In affected versions of Apple iOS, macOS, and watchOS, a sandboxed process may be able to circumvent sandbox restrictions.

Apply updates per vendor instructions.

Remediation due: 2022-09-15

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.