CVE-2021-25372Known exploitation

Out-of-bounds memory access via improper boundary check

Published Mar 26, 2021 · Updated Jan 14, 2026

Out-of-bounds access in Samsung Mobile Devices before SMR Mar-2021 Release 1 allows physically proximate attackers to access DSP memory. The DSP driver fails to enforce a boundary check before a memory access, allowing the operation to extend beyond its intended bounds. Exploitation requires physical access, high privileges, and an affected Exynos chipset; published details do not specify read or write semantics.

CVSS severity6.1
Medium
EPSS probability0.80%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds access in Samsung Mobile Devices before SMR Mar-2021 Release 1 allows physically proximate attackers to access DSP memory. The DSP driver fails to enforce a boundary check before a memory access, allowing the operation to extend beyond its intended bounds. Exploitation requires physical access, high privileges, and an affected Exynos chipset; published details do not specify read or write semantics.

The record

CVE
CVE-2021-25372
Published
Mar 26, 2021
Updated
Jan 14, 2026
Vendor
Samsung Electronics Co., Ltd.
Product
Samsung Mobile Devices
Classifications
CWE-787
Attack vector
physical
Privileges
admin

Timeline

How it unfolded

  1. Mar 26, 2021CVE publishedPublication date reported by the CVE source.
  2. Jan 14, 2026Record 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=Q(10.0), R(11.0) devices with exynos980, exynos2100, exynos9830 <SMR Mar-2021 Release 1

What conditions does exploitation require?

Attack vectorphysical
Required privilegesadmin

What is affected?

Samsung Electronics Co., Ltd. · Samsung Mobile Devicesversion=Q(10.0), R(11.0) devices with exynos980, exynos2100, exynos9830 <SMR Mar-2021 Release 1

Published CVSS scores

6.1Samsung MobileCVSS:3.1/AV:P/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
6.7NIST NVDCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
7.2NIST NVDAV:L/AC:L/Au:N/C:C/I:C/A:C

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)
Vectorphysical
Privilegesadmin
Known exploitationReported
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write

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.

Reported exploitation

Technologies

Your stack

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Your stack

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