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EPSS 0.1%top 98%

CVE-2026-21087: CWE-787: Out-of-bounds Write in Samsung Mobile Samsung Mobile Devices

0
High
VulnerabilityCVE-2026-21087cvecve-2026-21087cwe-787
Published: 09/09/2026 (09/09/2026, 04:47:34 UTC)
Source: CVE Database V5
Vendor/Project: Samsung Mobile
Product: Samsung Mobile Devices

Description

CVE-2026-21087 is a high-severity out-of-bounds write vulnerability in the libmdnie.so component of Samsung Mobile Devices. This flaw exists in versions prior to the SMR September 2026 Release 1 and allows local attackers to execute arbitrary code with system server privileges.

CVSS v4.0

Score 8.6high

Attack Vector
Local
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Vuln. Confidentiality
High
Vuln. Integrity
High
Vuln. Availability
High
Subsq. Confidentiality
None
Subsq. Integrity
None
Subsq. Availability
None
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 09/09/2026, 11:06:06 UTC

Technical Analysis

This vulnerability involves an out-of-bounds write in the libmdnie.so library on Samsung Mobile Devices. It affects devices running software versions before the SMR September 2026 Release 1. Exploitation by a local attacker can lead to arbitrary code execution with system server privileges, posing a significant security risk. The CVSS 4.0 base score is 8.6, indicating high severity. No official patch or remediation level has been published yet, and no known exploits are reported in the wild.

Potential Impact

Successful exploitation allows local attackers to execute arbitrary code with system server privileges, which could compromise the device's security and control critical system functions. This elevates the risk of privilege escalation and potential full device compromise.

Mitigation Recommendations

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, limit local access to trusted users and monitor for suspicious activity related to libmdnie.so. Avoid installing untrusted applications or executing unverified code locally.

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Technical Details

Data Version
5.2
Assigner Short Name
SamsungMobile
Date Reserved
2025-12-11T01:33:35.826Z
Cvss Version
4.0
State
PUBLISHED
Remediation Level
null

Threat ID: 6aa13d61acd9273b49346505

Added to database: 09/09/2026, 11:05:05 UTC

Last enriched: 09/09/2026, 11:06:06 UTC

Last updated: 09/09/2026, 22:52:09 UTC

Views: 9

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