CVE-2026-21087: CWE-787: Out-of-bounds Write in Samsung Mobile Samsung Mobile Devices
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.
AI Analysis
Technical Summary
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.
CVE-2026-21087: CWE-787: Out-of-bounds Write in Samsung Mobile 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
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
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.
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
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.