CVE-2026-21053

Local arbitrary file creation via improper input validation

Published Jul 10, 2026 · Updated Jul 10, 2026

Improper input validation in Samsung Email before 6.2.13.1 allows local users to create arbitrary files within its application sandbox. Samsung identifies only a missing input-validation check and does not disclose the affected component, accepted input, or file-creation operation. Exploitation requires local execution on a Galaxy device; impact is confined to file creation and resulting integrity or availability effects inside the app sandbox.

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

What happened

Improper input validation in Samsung Email before 6.2.13.1 allows local users to create arbitrary files within its application sandbox. Samsung identifies only a missing input-validation check and does not disclose the affected component, accepted input, or file-creation operation. Exploitation requires local execution on a Galaxy device; impact is confined to file creation and resulting integrity or availability effects inside the app sandbox.

The record

CVE
CVE-2026-21053
Published
Jul 10, 2026
Updated
Jul 10, 2026
Vendor
Samsung Electronics Co., Ltd.
Product
Samsung Email
Classifications
CWE-20
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 10, 2026Record 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?

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 Co., Ltd. · Samsung EmailAffected versions are unavailable in this record.

Published CVSS scores

5.1Samsung MobileCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA: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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation

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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