CVE-2021-30605

Local access-control bypass via weakened DCOM permissions

Published Sep 8, 2021 · Updated Aug 3, 2024

Access control bypass in Google Chrome before 1.0.2.0 allows local users to access protected DCOM objects through weakened permissions. The Windows ChromeOS Readiness Tool installer loosens discretionary access controls on two DCOM objects instead of preserving their restricted access rights. Exploitation requires local low-privileged access, and published details do not identify the objects or the operations they expose.

CVSS severity7.8
High
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Access control bypass in Google Chrome before 1.0.2.0 allows local users to access protected DCOM objects through weakened permissions. The Windows ChromeOS Readiness Tool installer loosens discretionary access controls on two DCOM objects instead of preserving their restricted access rights. Exploitation requires local low-privileged access, and published details do not identify the objects or the operations they expose.

The record

CVE
CVE-2021-30605
Published
Sep 8, 2021
Updated
Aug 3, 2024
Vendor
Google Cloud
Product
Google Chrome
Classifications
CWE-287
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 8, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <1.0.2.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Google Cloud · Google Chromeversion=unspecified <1.0.2.0

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.6NIST NVDAV:L/AC:L/Au:N/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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