LiveActive security incident?Get immediate response
CVE Record

CVE-2021-30536: Out of bounds read in V8 in Google Chrome prior to 91.0.4472.77 allowed a remote attacker to potentially ex...

Out of bounds read in V8 in Google Chrome prior to 91.0.4472.77 allowed a remote attacker to potentially exploit stack corruption via a crafted HTML page.

UnknownCVSS not scoredNot KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

This Chrome vulnerability was in V8, Chrome's JavaScript engine. A malicious web page could trigger an out-of-bounds read and potentially lead to stack corruption. For executives, this is mainly an endpoint browser exposure: users visiting untrusted pages could be at risk if Chrome was not updated.

Executive priority

Treat this as a high-priority browser patching issue, especially for internet-facing user workstations. There is no sourced evidence of active exploitation in the bundle, but remote browser memory-corruption risk warrants prompt remediation.

Technical view

CVE-2021-30536 is an out-of-bounds read in V8 affecting Google Chrome before 91.0.4472.77. The CVE description says remote exploitation was potentially possible through crafted HTML, with stack corruption as the impact. The bundle does not provide CVSS, CWE, root-cause detail, or confirmed exploit telemetry.

Likely exposure

Likely exposure is limited to endpoints running Google Chrome before 91.0.4472.77. Organizations using Linux distribution browser packages should also review the Gentoo and Fedora advisories referenced in the bundle.

Exploitation context

The source bundle supports potential remote exploitation through crafted HTML. It does not support claims of active exploitation: KEV is false, and no cited source in the bundle states observed exploitation.

Researcher notes

Available evidence is sparse. The public CVE identifies V8 out-of-bounds read and potential stack corruption via crafted HTML, but lacks CVSS, CWE, affected version granularity beyond prior to 91.0.4472.77, and exploit confirmation. Avoid inferring impact beyond the supplied sources.

Mitigation direction

  • Update Google Chrome to 91.0.4472.77 or later.
  • Apply relevant Gentoo or Fedora browser security updates where applicable.
  • Prioritize managed browser updates on user workstations and shared browsing systems.
  • Check current vendor guidance for any additional hardening or backported package details.

Validation and detection

  • Inventory Chrome versions and flag anything earlier than 91.0.4472.77.
  • Confirm Linux package versions against Gentoo or Fedora advisory guidance.
  • Review endpoint management telemetry for stale or unmanaged Chrome installations.
  • Verify update policies successfully deploy browser security fixes across all user groups.
Prepared
Confidence
medium
Sources
7

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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 · low confidence lookup

CVE-2021-30536 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

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.

0CVSS vectors
0Timeline events
0ADP providers
6Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
GoogleChromeunspecifiedListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.