CVE-2025-13639Network attack vector

Arbitrary memory read and write via crafted HTML

Published Dec 2, 2025 · Updated Dec 8, 2025

Inappropriate implementation in WebRTC in Google Chrome before 143.0.7499.41 allows remote attackers to read and write memory via crafted HTML. Google identifies the affected locus only as WebRTC; the restricted issue record does not disclose the incorrect operation performed on page-controlled input. A victim must load the crafted page, after which browser-process confidentiality and integrity can be compromised without a reported service interruption.

CVSS severity8.1
High
EPSS probability0.25%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Inappropriate implementation in WebRTC in Google Chrome before 143.0.7499.41 allows remote attackers to read and write memory via crafted HTML. Google identifies the affected locus only as WebRTC; the restricted issue record does not disclose the incorrect operation performed on page-controlled input. A victim must load the crafted page, after which browser-process confidentiality and integrity can be compromised without a reported service interruption.

The record

CVE
CVE-2025-13639
Published
Dec 2, 2025
Updated
Dec 8, 2025
Vendor
Google Cloud
Product
Google Chrome
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 2, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 8, 2025Record 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=143.0.7499.41 <143.0.7499.41

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Google Cloud · Google Chromeversion=143.0.7499.41 <143.0.7499.41

Published CVSS scores

8.1CISA ADP VulnrichmentCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
8.1NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/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-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
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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