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CVE Record

CVE-2021-30575: Out of bounds write in Autofill in Google Chrome prior to 92.0.4515.107 allowed a remote attacker who had c...

Out of bounds write in Autofill in Google Chrome prior to 92.0.4515.107 allowed a remote attacker who had compromised the renderer process to potentially exploit heap corruption via a crafted HTML page.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2021-30575 is a Chrome Autofill memory corruption issue fixed in Chrome 92.0.4515.107. A malicious page could potentially abuse it after the attacker already compromised Chrome's renderer process. The main business risk is unmanaged or outdated browsers, especially on desktops where browser compromise can expose sensitive web sessions.

Executive priority

Treat as a browser fleet hygiene priority, not an emergency zero-day based on the provided evidence. Outdated browsers are high-value targets, but no active exploitation is cited here. Ensure managed update coverage and verify completion.

Technical view

The CVE describes an out-of-bounds write in Chrome Autofill before 92.0.4515.107. The stated attacker condition is prior renderer compromise, with possible heap corruption triggered through crafted HTML. Public source details do not include CVSS, CWE, patch mechanics, or proof-of-concept information.

Likely exposure

Exposure is likely where Google Chrome desktop installations remained below 92.0.4515.107 after July 2021. Fedora Chromium package advisories also indicate downstream Linux package relevance. The bundle does not identify other affected Chromium-based products, so treat those as requiring vendor-specific confirmation.

Exploitation context

The source bundle does not show CISA KEV listing or active exploitation evidence. The CVE requires a compromised renderer process, so it is best understood as potentially useful in a browser exploit chain rather than confirmed standalone initial compromise.

Researcher notes

The public description is sparse. Key constraints are Autofill, out-of-bounds write, crafted HTML, and prerequisite renderer compromise. Avoid assuming sandbox escape, RCE outcome, affected Chromium forks, or exploit availability without additional vendor evidence.

Mitigation direction

  • Update Google Chrome to 92.0.4515.107 or later.
  • Apply relevant Fedora Chromium package updates where Fedora systems are in scope.
  • Check vendor guidance for any Chromium-derived browsers in your environment.
  • Prioritize managed desktop fleets and high-risk users first.

Validation and detection

  • Inventory Chrome versions across endpoints and compare against 92.0.4515.107.
  • Confirm Linux package managers report patched Chromium builds where applicable.
  • Review browser management telemetry for update failures or pinned versions.
  • Document any unsupported browsers needing replacement or compensating controls.
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-2021-30575 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.