CVE-2025-3069Network attack vector

Privilege escalation via undisclosed Extensions security check

Published Apr 2, 2025 · Updated Feb 26, 2026

Inappropriate implementation in Extensions in Google Chrome before 135.0.7049.52 allows remote attackers to escalate privileges via a crafted HTML page. The public Chrome record identifies the Extensions component but does not disclose which security check is implemented incorrectly; its linked Chromium issue requires sign-in and exposes no technical details. Exploitation requires a user to load attacker-controlled HTML, after which the flaw grants elevated browser privileges; the exact privilege boundary and resulting operations remain undisclosed.

CVSS severity8.8
High
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Inappropriate implementation in Extensions in Google Chrome before 135.0.7049.52 allows remote attackers to escalate privileges via a crafted HTML page. The public Chrome record identifies the Extensions component but does not disclose which security check is implemented incorrectly; its linked Chromium issue requires sign-in and exposes no technical details. Exploitation requires a user to load attacker-controlled HTML, after which the flaw grants elevated browser privileges; the exact privilege boundary and resulting operations remain undisclosed.

The record

CVE
CVE-2025-3069
Published
Apr 2, 2025
Updated
Feb 26, 2026
Vendor
Google Cloud
Product
Google Chrome
Classifications
CWE-358, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 2, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 26, 2026Record 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=135.0.7049.52 <135.0.7049.52

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Google Cloud · Google Chromeversion=135.0.7049.52 <135.0.7049.52

Published CVSS scores

8.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-358Improperly Implemented Security Check for Standard
T1203Exploitation for Client Execution

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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