CVE-2020-6503Network attack vector

Process-memory disclosure via crafted HTML page

Published Jun 3, 2020 · Updated Aug 4, 2024

Information disclosure in Google Chrome before 74.0.3729.108 allows remote attackers to read process memory via a crafted HTML page. Google identifies the locus only as its accessibility implementation and has not published the incorrect operation performed on page-controlled input. Exploitation requires a user to open the crafted page; the reported consequence is memory disclosure without integrity or availability impact.

CVSS severity6.5
Medium
EPSS probability0.75%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Google Chrome before 74.0.3729.108 allows remote attackers to read process memory via a crafted HTML page. Google identifies the locus only as its accessibility implementation and has not published the incorrect operation performed on page-controlled input. Exploitation requires a user to open the crafted page; the reported consequence is memory disclosure without integrity or availability impact.

The record

CVE
CVE-2020-6503
Published
Jun 3, 2020
Updated
Aug 4, 2024
Vendor
Google Cloud
Product
Google Chrome
Classifications
CWE-209, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 3, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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 <74.0.3729.108

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Google Cloud · Google Chromeversion=unspecified <74.0.3729.108

Published CVSS scores

4.3NIST NVDAV:N/AC:M/Au:N/C:P/I:N/A:N
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/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-209Generation of Error Message Containing Sensitive Information
T1189Drive-by Compromise

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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