Is CVE-2021-30952 being actively exploited?

Yes. CVE-2021-30952 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added on March 5, 2026.

What is the CVSS score for CVE-2021-30952?

CVE-2021-30952 has a CVSS 3.1 base score of 7.8 (HIGH).

CVE-2021-30952

HIGH · CVSS 7.8CISA KEV: actively exploitedEPSS 7.0%EU EUVD: exploited

An integer overflow was addressed with improved input validation. This issue is fixed in tvOS 15.2, macOS Monterey 12.1, Safari 15.2, iOS 15.2 and iPadOS 15.2, watchOS 8.3. Processing maliciously crafted web content may lead to arbitrary code execution.

Key facts

CVSS score: 7.8 (v3.1)
Severity: HIGH
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-190
EPSS score: 7.0% (94th percentile)
In CISA KEV: Yes, added March 5, 2026
In EU EUVD: Yes (EUVD-2021-17869)
Published: August 24, 2021
NVD last modified: June 17, 2026
Status: Analyzed

CISA Known Exploited Vulnerability

Apple Multiple Products Integer Overflow or Wraparound Vulnerability

Added to the KEV catalog on March 5, 2026; federal remediation due March 26, 2026.

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2021-17869 in the EU Vulnerability Database. ENISA flags it as known exploited. Last updated in EUVD on March 6, 2026.

View on the EU Vulnerability Database

Affected products

apple / ipados
apple / iphone os
apple / macos
apple / safari
apple / tvos
apple / watchos
debian / debian linux
debian / debian linux
fedoraproject / fedora
fedoraproject / fedora
webkitgtk / webkitgtk
wpewebkit / wpe webkit

Certified products that may be affected

4 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

Strong customer authentication pour Apple Pay sur Apple Watch série 4 exécutant watchOS 7.4.1 (Version 18T201) - Apple Inc. - Common Criteria ANSSI-CC-2023/13 - active
Strong Customer Authentication pour Apple Pay sur iPhone SE (de seconde génération) exécutant iOS 14.5.1 Version 18E212 - Apple Inc. - Common Criteria ANSSI-CC-2022/05 - active
Strong Customer Authentication pour Apple Pay sur iPhone (SoC A12 Bionic) exécutant iOS 14.5.1 Version 18E212 - Apple Inc. - Common Criteria ANSSI-CC-2022/04 - active
Apple iPadOS 15 - Apple Inc. - Common Criteria CCEVS-VR-VID-11238-2022 - archived

References

http://www.openwall.com/lists/oss-security/2022/01/21/2(Mailing List, Third Party Advisory)
https://cloud.google.com/blog/topics/threat-intelligence/coruna-powerful-ios-exploit-kit(Exploit, Third Party Advisory)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7EQVZ3CEMTINLBZ7PBC7WRXVEVCRHNSM/(Broken Link)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HQKWD4BXRDD2YGR5AVU7H5J5PIQIEU6V/(Broken Link)
https://support.apple.com/en-us/HT212975(Release Notes, Vendor Advisory)
https://support.apple.com/en-us/HT212976(Release Notes, Vendor Advisory)
https://support.apple.com/en-us/HT212978(Release Notes, Vendor Advisory)
https://support.apple.com/en-us/HT212980(Release Notes, Vendor Advisory)
https://support.apple.com/en-us/HT212982(Release Notes, Vendor Advisory)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30952(US Government Resource)
https://www.debian.org/security/2022/dsa-5060(Mailing List, Third Party Advisory)
https://www.debian.org/security/2022/dsa-5061(Mailing List, Third Party Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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