CVE-2021-25331

Balance disclosure via unauthenticated lock-screen QR scan

Published Mar 4, 2021 · Updated Aug 3, 2024

Improper access control in Samsung Pay mini before 4.0.14 allows physically proximate attackers to view balance information from the lock screen. The lock-screen flow exposes the balance after a specific QR code is scanned without first enforcing device authentication. Physical proximity to a locked device and interaction to scan the QR code are required; the reported consequence is limited to balance disclosure.

CVSS severity3.2
Low
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Samsung Pay mini before 4.0.14 allows physically proximate attackers to view balance information from the lock screen. The lock-screen flow exposes the balance after a specific QR code is scanned without first enforcing device authentication. Physical proximity to a locked device and interaction to scan the QR code are required; the reported consequence is limited to balance disclosure.

The record

CVE
CVE-2021-25331
Published
Mar 4, 2021
Updated
Aug 3, 2024
Vendor
Samsung Electronics Co., Ltd.
Product
Samsung Pay mini
Classifications
CWE-200, T1409
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 4, 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=unspecified <4.0.14

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

Samsung Electronics Co., Ltd. · Samsung Pay miniversion=unspecified <4.0.14

Published CVSS scores

3.2Samsung MobileCVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L
1.9NVDAV:L/AC:M/Au:N/C:P/I:N/A:N
2.4NVDCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

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)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1409Access Stored Application Data

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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