Security readout for executives and security teams
This is an Apple/WebKit memory corruption flaw where malicious web content could lead to code execution. For executives, the risk is browser-driven compromise on affected Apple platforms and WebKit-based environments. The bundle names fixed Apple releases but gives no CVSS score, vulnerable version ranges, or evidence of active exploitation. Exposure is most likely on Apple devices or Safari installations not updated to the named fixed releases, plus Linux systems using affected WebKitGTK or WPE WebKit packages covered by Debian and Fedora advisories. Exact vulnerable version ranges are not provided in the source bundle. Prioritize routine-to-urgent patch verification for internet-browsing endpoints, especially managed Apple fleets and Linux systems using WebKit components. The code execution impact is serious, but the supplied evidence does not confirm active exploitation or emergency KEV-driven response. Mitigation focus: Upgrade to Apple fixed releases named in the advisory.; Apply Debian WebKitGTK and WPE WebKit security updates where applicable.; Apply Fedora WebKit-related security updates where applicable..
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
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
Execution 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-2021-30851 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://support.apple.com/en-us/HT212814CVE reference · x_refsource_MISC
- https://support.apple.com/en-us/HT212819CVE reference · x_refsource_MISC
- https://support.apple.com/en-us/HT212815CVE reference · x_refsource_MISC
- https://support.apple.com/en-us/HT212816CVE reference · x_refsource_MISC
- https://support.apple.com/kb/HT212869CVE reference · x_refsource_CONFIRM
- DSA-4995CVE reference · vendor-advisory, x_refsource_DEBIAN
- DSA-4996CVE reference · vendor-advisory, x_refsource_DEBIAN
- FEDORA-2021-131360fa9aCVE reference · vendor-advisory, x_refsource_FEDORA
- FEDORA-2021-483d896d1dCVE reference · vendor-advisory, x_refsource_FEDORA
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.