CVE-2021-25507

Secure Folder notification disclosure via missing authorization

Published Nov 5, 2021 · Updated Aug 3, 2024

Improper authorization in Samsung Flow before 4.8.03.5 allows attackers on a connected PC to read Secure Folder notification data. The mobile notification-sharing path forwards part of protected notifications to the paired PC without enforcing Secure Folder authorization. Reachability requires an established device connection, and the documented consequence is limited to disclosure of part of the protected notification data.

CVSS severity5.7
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authorization in Samsung Flow before 4.8.03.5 allows attackers on a connected PC to read Secure Folder notification data. The mobile notification-sharing path forwards part of protected notifications to the paired PC without enforcing Secure Folder authorization. Reachability requires an established device connection, and the documented consequence is limited to disclosure of part of the protected notification data.

The record

CVE
CVE-2021-25507
Published
Nov 5, 2021
Updated
Aug 3, 2024
Vendor
Samsung Electronics
Product
Samsung Flow
Classifications
CWE-285, T1517
Attack vector
adjacent
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 5, 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=- <4.8.03.5

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesauthenticated

What is affected?

Samsung Electronics · Samsung Flowversion=- <4.8.03.5

Published CVSS scores

2.7NIST NVDAV:A/AC:L/Au:S/C:P/I:N/A:N
5.7Samsung MobileCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/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)
Vectoradjacent
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-285Improper Authorization
T1517Access Notifications

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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