Security readout for executives and security teams
Plain-English summary
CVE-2021-30530 is a Chrome WebAudio memory-safety flaw fixed before version 91.0.4472.77. A malicious webpage could trigger out-of-bounds memory access in vulnerable browsers. The sources do not provide CVSS, detailed impact, or active exploitation evidence.
Executive priority
Treat this as a hygiene-driven browser patching item unless old Chrome or Chromium remains in use. Business urgency rises for unmanaged endpoints because browser flaws can be reached through normal web activity.
Technical view
The CVE describes out-of-bounds memory access in Chrome's WebAudio component via crafted HTML. Affected scope is Google Chrome before 91.0.4472.77, with downstream Gentoo and Fedora Chromium advisories. Public details are limited, and the Chromium bug reference is not enough here to confirm root cause or exploitability details.
Likely exposure
Exposure is most likely on unmanaged desktops, legacy gold images, or Linux systems running outdated Chrome or Chromium packages from before the 2021 vendor fixes.
Exploitation context
The source bundle supports remote attack through a crafted HTML page. It does not show CISA KEV listing, in-the-wild exploitation, public exploit availability, or exploitation prerequisites beyond browsing malicious content.
Researcher notes
Evidence is sparse: no CVSS, CWE, detailed patch notes, or confirmed exploitation are included. Avoid assuming code execution or sandbox escape from this record alone; validate only version exposure and vendor advisory coverage.
Mitigation direction
- Update Chrome to 91.0.4472.77 or a current supported release.
- Update Chromium packages through affected Linux distribution channels.
- Check Gentoo and Fedora advisories for distro-specific package status.
- Prioritize managed browser auto-update coverage for all endpoints.
- Restrict use of unsupported legacy browser builds.
Validation and detection
- Inventory Chrome and Chromium versions across endpoint management tools.
- Confirm installed versions are 91.0.4472.77 or vendor-patched later builds.
- Review Gentoo and Fedora package advisory applicability for Linux assets.
- Check for unmanaged browsers outside standard software inventory.
- Document any exception with compensating controls and owner.
Public sources used
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.
CVE-2021-30530 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
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://chromereleases.googleblog.com/2021/05/stable-channel-update-for-desktop_25.htmlCVE reference · x_refsource_MISC
- https://crbug.com/1201033CVE reference · x_refsource_MISC
- GLSA-202107-06CVE reference · vendor-advisory, x_refsource_GENTOO
- FEDORA-2021-f94dadff78CVE reference · vendor-advisory, x_refsource_FEDORA
- FEDORA-2021-ca58c57bdfCVE 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.