CVE-2021-25461Public exploit

Stack overflow via improper APAService length check

Published Sep 9, 2021 · Updated Aug 3, 2024

Stack-based buffer overflow in APAService in Samsung Mobile Devices on Android 8.1 allows local users to corrupt process memory. APAService fails to enforce the input-length boundary needed to prevent data from overflowing a stack buffer; no affected function or field is public. Reachability is local through an Android service interface, and published sources establish neither code execution nor data disclosure.

CVSS severity4.0
Medium
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in APAService in Samsung Mobile Devices on Android 8.1 allows local users to corrupt process memory. APAService fails to enforce the input-length boundary needed to prevent data from overflowing a stack buffer; no affected function or field is public. Reachability is local through an Android service interface, and published sources establish neither code execution nor data disclosure.

The record

CVE
CVE-2021-25461
Published
Sep 9, 2021
Updated
Aug 3, 2024
Vendor
Samsung Electronics Co., Ltd.
Product
Samsung Mobile Devices
Classifications
CWE-787, CWE-120
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 9, 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=O(8.1) <SMR Sep-2021 Release 1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Samsung Electronics Co., Ltd. · Samsung Mobile Devicesversion=O(8.1) <SMR Sep-2021 Release 1

Published CVSS scores

4.0Samsung MobileCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
4.6NIST NVDAV:L/AC:L/Au:N/C:P/I:P/A:P
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

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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