CVE-2025-6557Network attack vector

Code execution via undisclosed DevTools validation failure

Published Jun 24, 2025 · Updated Feb 26, 2026

Insufficient data validation in Chrome DevTools before 138.0.7204.49 on Windows allows remote attackers to execute code via crafted HTML. Google identifies DevTools as the affected component but has not disclosed the specific validation failure; the linked issue remains restricted. Exploitation requires convincing a user to perform specific UI gestures, after which attacker-controlled code executes.

CVSS severity5.4
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insufficient data validation in Chrome DevTools before 138.0.7204.49 on Windows allows remote attackers to execute code via crafted HTML. Google identifies DevTools as the affected component but has not disclosed the specific validation failure; the linked issue remains restricted. Exploitation requires convincing a user to perform specific UI gestures, after which attacker-controlled code executes.

The record

CVE
CVE-2025-6557
Published
Jun 24, 2025
Updated
Feb 26, 2026
Vendor
Google Cloud
Product
Google Chrome
Classifications
CWE-1021, T1204
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 24, 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=138.0.7204.49 <138.0.7204.49

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Google Cloud · Google Chromeversion=138.0.7204.49 <138.0.7204.49

Published CVSS scores

5.4CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

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-1021Improper Restriction of Rendered UI Layers or Frames
T1204User 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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