CVE-2025-21039

Itinerary modification via unverified broadcast intent

Published Sep 3, 2025 · Updated Sep 3, 2025

Improper intent verification in Samsung Assistant before 9.3.2 allows local attackers to modify stored itinerary information. SystemExceptionalBroadcastReceiver accepts an explicit Android intent from another application without confirming that it is an authorized system intent, then treats the spoofed message as trusted itinerary input. A malicious application on the same Galaxy device requires neither user interaction nor prior privileges; the public record reports no data disclosure or broader code execution.

CVSS severity5.1
Medium
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper intent verification in Samsung Assistant before 9.3.2 allows local attackers to modify stored itinerary information. SystemExceptionalBroadcastReceiver accepts an explicit Android intent from another application without confirming that it is an authorized system intent, then treats the spoofed message as trusted itinerary input. A malicious application on the same Galaxy device requires neither user interaction nor prior privileges; the public record reports no data disclosure or broader code execution.

The record

CVE
CVE-2025-21039
Published
Sep 3, 2025
Updated
Sep 3, 2025
Vendor
Samsung Electronics
Product
Samsung Assistant
Classifications
CWE-925, CAPEC-499, T1565.001
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 3, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 3, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Samsung Electronics · Samsung AssistantAffected versions are unavailable in this record.

Published CVSS scores

3.3NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
5.1Samsung MobileCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-925Improper Verification of Intent by Broadcast Receiver
CAPEC-499Android Intent Intercept
T1565.001Stored Data Manipulation

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

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Your stack

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