CVE-2026-21125: CWE-20: Improper Input Validation in Samsung Mobile Samsung Mobile Devices
Description
Improper input validation in parsing sheifd in libsimba.heifdec.media.samsung.so prior to SMR Oct-2026 Release 1 allows local attackers to potentially execute arbitrary code.
CVSS v4.0
Score 8.6high
Affected software
Samsung Mobile
Samsung Mobile Devices
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-21125) arises from improper input validation in the sheifd parsing functionality within the libsimba.heifdec.media.samsung.so library on Samsung Mobile Devices. It allows local attackers to potentially execute arbitrary code by exploiting this flaw. The vulnerability is present in versions before the SMR October 2026 Release 1. The CVSS 4.0 score is 8.6, indicating high severity, with local attack vector and low attack complexity. No user interaction or privileges are required, but the vulnerability requires local access.
Potential Impact
Successful exploitation could lead to arbitrary code execution by a local attacker, which may compromise the affected device's confidentiality, integrity, and availability. The high CVSS score reflects the significant risk posed by this vulnerability if exploited.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since the vulnerability affects versions prior to the SMR October 2026 Release 1, applying this or later security maintenance releases from Samsung Mobile is recommended once available. Until then, restrict local access to trusted users only.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- SamsungMobile
- Date Reserved
- 2025-12-11T01:33:35.832Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6acc6a3e2cdf04f65661372e
Added to database: 10/12/2026, 05:03:58 UTC
Last enriched: 10/12/2026, 05:18:20 UTC
Last updated: 10/13/2026, 04:19:07 UTC
Views: 23
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