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CVE-2021-30593: Out of bounds read in Tab Strip in Google Chrome prior to 92.0.4515.131 allowed an attacker who convinced a...

Out of bounds read in Tab Strip in Google Chrome prior to 92.0.4515.131 allowed an attacker who convinced a user to install a malicious extension to perform an out of bounds memory read via a crafted HTML page.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2021-30593 is a Google Chrome memory-read flaw in the Tab Strip before version 92.0.4515.131. The cited CVE says exploitation required convincing a user to install a malicious extension and then interact with crafted HTML. Sources do not claim code execution or active exploitation.

Executive priority

Treat as a browser hygiene issue with moderate urgency. Prioritize systems with outdated Chrome, weak extension controls, or high-risk users. There is no source-backed evidence of active exploitation in the provided bundle.

Technical view

The issue is an out-of-bounds read in Chrome's Tab Strip component. A malicious extension combined with crafted HTML could read memory outside expected bounds. The bundle provides no CVSS, CWE, exploitability metrics, or public root-cause detail beyond the component and required user interaction.

Likely exposure

Exposure is most likely on endpoints running Google Chrome older than 92.0.4515.131, especially where users can install untrusted extensions. Current enterprise-managed browsers are likely remediated if automatic updates and extension controls are enforced.

Exploitation context

The source bundle does not indicate CISA KEV listing or active exploitation. The attack scenario is not drive-by alone; it requires a malicious extension installation plus crafted HTML, which lowers likelihood but still matters for unmanaged browsers.

Researcher notes

Evidence is sparse: the CVE describes the vulnerable component, prerequisite malicious extension, crafted HTML trigger, and fixed Chrome version. The Chromium bug reference is included, but the bundle provides no detailed technical write-up, exploit status, or CVSS vector.

Mitigation direction

  • Update Google Chrome to 92.0.4515.131 or later supported versions.
  • Restrict extension installation to approved enterprise allowlists.
  • Review endpoints for unmanaged or outdated Chrome installations.
  • Check Fedora or distribution advisories where packaged browser builds are used.

Validation and detection

  • Inventory Chrome versions across managed and unmanaged endpoints.
  • Confirm Chrome is at least 92.0.4515.131 or a current supported release.
  • Audit installed browser extensions for unauthorized or suspicious entries.
  • Verify browser update policy and extension allowlist enforcement.
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

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CVE-2021-30593 mapping review

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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.