CVE-2021-25355

Unauthorized actions via hijackable PendingIntent

Published Mar 25, 2021 · Updated Aug 3, 2024

Improper authorization in Samsung Notes before 4.2.00.22 allows local users to perform unauthorized actions by hijacking a PendingIntent. An unsafe PendingIntent lets another local process hijack the delegated action; Samsung has not disclosed the creating component or unsafe construction. Exploitation requires local low-privileged access without user interaction, and the exact unauthorized action remains undisclosed.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Improper authorization in Samsung Notes before 4.2.00.22 allows local users to perform unauthorized actions by hijacking a PendingIntent. An unsafe PendingIntent lets another local process hijack the delegated action; Samsung has not disclosed the creating component or unsafe construction. Exploitation requires local low-privileged access without user interaction, and the exact unauthorized action remains undisclosed.

The record

CVE
CVE-2021-25355
Published
Mar 25, 2021
Updated
Aug 3, 2024
Vendor
Samsung Electronics Co., Ltd.
Product
Samsung Notes
Classifications
CWE-285, T1625
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 25, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <4.2.00.22

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Samsung Electronics Co., Ltd. · Samsung Notesversion=unspecified <4.2.00.22

Published CVSS scores

5.5Samsung MobileCVSS:3.1/AV:L/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-285Improper Authorization
T1625Hijack Execution Flow

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.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo