CVE-2018-9466Public exploitNetwork attack vector

Remote code execution via unchecked XML buffer writes

Published Nov 19, 2024 · Updated Nov 3, 2025

Out-of-bounds write in Android Runtime libxml2 in Android 7.0 through 8.1 allows remote attackers to execute code via a crafted XML file. xmlSnprintfElementContent in valid.c recursively writes an element-content definition into a fixed buffer but uses stale length checks and can append data after the remaining space is exhausted. Exploitation requires user interaction and reaches code execution in the unprivileged application context that processes the malicious XML.

CVSS severity8.8
High
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in Android Runtime libxml2 in Android 7.0 through 8.1 allows remote attackers to execute code via a crafted XML file. xmlSnprintfElementContent in valid.c recursively writes an element-content definition into a fixed buffer but uses stale length checks and can append data after the remaining space is exhausted. Exploitation requires user interaction and reaches code execution in the unprivileged application context that processes the malicious XML.

The record

CVE
CVE-2018-9466
Published
Nov 19, 2024
Updated
Nov 3, 2025
Vendor
Google Cloud
Product
Android
Classifications
CWE-787, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 19, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 3, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=7
  2. Affected versionversion=7.0
  3. Affected versionversion=8
  4. Affected versionversion=8.1
  5. Affected versionversion=nyc-mr1-dev
  6. Affected versionversion=nyc-mr2-dev

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Google Cloud · Androidversion=7; version=7.0; version=8; version=8.1; version=nyc-mr1-dev; version=nyc-mr2-dev

Published CVSS scores

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

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1203Exploitation for Client Execution

Public exploit references

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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