CVE-2021-0409

Local information disclosure via incorrect bounds check

Published Oct 25, 2021 · Updated Aug 3, 2024

Out-of-bounds read in Android 10.0 and 11.0 allows local users to disclose process memory through the MediaTek FLV extractor. The FLV extractor applies an incorrect bounds check to crafted media data and reads beyond the intended buffer. Exploitation requires local access but no additional execution privileges or user interaction; disclosure is limited to memory reachable by the extractor.

CVSS severityUnavailable
Unscored
EPSS probability0.12%
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 read in Android 10.0 and 11.0 allows local users to disclose process memory through the MediaTek FLV extractor. The FLV extractor applies an incorrect bounds check to crafted media data and reads beyond the intended buffer. Exploitation requires local access but no additional execution privileges or user interaction; disclosure is limited to memory reachable by the extractor.

The record

CVE
CVE-2021-0409
Published
Oct 25, 2021
Updated
Aug 3, 2024
Vendor
Google Cloud
Product
Android
Classifications
CWE-125, T1005
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 25, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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=Android 10.0, 11.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Google Cloud · Androidversion=Android 10.0, 11.0

Published CVSS scores

No CVSS assessment is available in this record.

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1005Data from Local System

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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