CVE-2021-25387Network attack vector

Code execution via improper frame input validation

Published Jun 11, 2021 · Updated Aug 3, 2024

Heap-based buffer overflow in Samsung Mobile Devices before SMR May-2021 Release 1 allows remote attackers to execute code in mediaextractor. The sflacfd_get_frm() function in libsflacextractor inadequately validates frame input, allowing a heap buffer overflow. Network delivery requires no privileges or user interaction, and successful exploitation runs arbitrary code in the mediaextractor process.

CVSS severity9.0
Critical
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in Samsung Mobile Devices before SMR May-2021 Release 1 allows remote attackers to execute code in mediaextractor. The sflacfd_get_frm() function in libsflacextractor inadequately validates frame input, allowing a heap buffer overflow. Network delivery requires no privileges or user interaction, and successful exploitation runs arbitrary code in the mediaextractor process.

The record

CVE
CVE-2021-25387
Published
Jun 11, 2021
Updated
Aug 3, 2024
Vendor
Samsung Electronics Co., Ltd.
Product
Samsung Mobile Devices
Classifications
CWE-122, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 11, 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), P(9.x), Q(10.0), R(11.0) <SMR MAY-2021 Release 1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Samsung Electronics Co., Ltd. · Samsung Mobile Devicesversion=O(8.1), P(9.x), Q(10.0), R(11.0) <SMR MAY-2021 Release 1

Published CVSS scores

9.0Samsung MobileCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
10.0NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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