Security readout for executives and security teams
CVE-2021-30952 is an Apple/WebKit integer overflow where malicious web content could run code on a user's device. It requires user interaction, such as opening crafted content, but it is listed in CISA KEV, so exploitation is confirmed by a cited government source. Exposure is most likely on Apple devices or Safari/WebKit components below the fixed versions. Linux environments using WebKitGTK or WPE WebKit may also need review because Debian, Fedora, and oss-security advisories are referenced. Treat this as urgent patch validation for Apple and WebKit exposure. It combines high impact, remote web-content attack surface, and confirmed known exploitation. Mitigation focus: Update Apple platforms to the fixed versions or later.; Ensure Safari is at version 15.2 or later where applicable.; Review WebKitGTK and WPE WebKit vendor advisories for Linux fleets..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CWE-190: Exact CWE lookup
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Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-30952 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 8.8 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CISA KEV status
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://support.apple.com/en-us/HT212975CVE reference · x_refsource_MISC
- https://support.apple.com/en-us/HT212976CVE reference · x_refsource_MISC
- https://support.apple.com/en-us/HT212978CVE reference · x_refsource_MISC
- https://support.apple.com/en-us/HT212980CVE reference · x_refsource_MISC
- https://support.apple.com/en-us/HT212982CVE reference · x_refsource_MISC
- FEDORA-2022-25a98f5d55CVE reference · vendor-advisory, x_refsource_FEDORA
- DSA-5061CVE reference · vendor-advisory, x_refsource_DEBIAN
- DSA-5060CVE reference · vendor-advisory, x_refsource_DEBIAN
- FEDORA-2022-f7366e60cbCVE reference · vendor-advisory, x_refsource_FEDORA
- https://cloud.google.com/blog/topics/threat-intelligence/coruna-powerful-ios-exploit-kitCVE reference · third-party-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30952CVE reference · government-resource
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Integer Overflow or Wraparound
Integer Overflow or Wraparound represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.