CVE-2026-21085: CWE-787 Out-of-bounds Write in Samsung Mobile Samsung Mobile Devices
CVE-2026-21085 is a high-severity vulnerability involving an out-of-bounds write in the Keymaster trustlet component of Samsung Mobile Devices. This flaw affects devices prior to the SMR (Security Maintenance Release) September 2026 Release 1. It allows local attackers with privileged access to write outside the intended memory bounds, potentially leading to memory corruption. No official patch or remediation guidance has been provided yet. There are no known exploits in the wild at this time.
AI Analysis
Technical Summary
This vulnerability is an out-of-bounds write (CWE-787) in the Keymaster trustlet of Samsung Mobile Devices before the SMR September 2026 Release 1. It enables local privileged attackers to write beyond allocated memory, which can cause memory corruption and potentially impact system integrity or security. The CVSS 4.0 score is 8.4 (high), reflecting the local attack vector with low complexity and no user interaction required, but requiring high privileges. No vendor advisory or patch information is currently available.
Potential Impact
Successful exploitation allows a local privileged attacker to write out-of-bounds memory in the Keymaster trustlet, which may lead to memory corruption and compromise of device security functions. The vulnerability does not require user interaction and has high impact on confidentiality, integrity, and availability as per the CVSS vector.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, limit local privileged access to trusted users only.
CVE-2026-21085: CWE-787 Out-of-bounds Write in Samsung Mobile Samsung Mobile Devices
Description
CVE-2026-21085 is a high-severity vulnerability involving an out-of-bounds write in the Keymaster trustlet component of Samsung Mobile Devices. This flaw affects devices prior to the SMR (Security Maintenance Release) September 2026 Release 1. It allows local attackers with privileged access to write outside the intended memory bounds, potentially leading to memory corruption. No official patch or remediation guidance has been provided yet. There are no known exploits in the wild at this time.
CVSS v4.0
Score 8.4high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability is an out-of-bounds write (CWE-787) in the Keymaster trustlet of Samsung Mobile Devices before the SMR September 2026 Release 1. It enables local privileged attackers to write beyond allocated memory, which can cause memory corruption and potentially impact system integrity or security. The CVSS 4.0 score is 8.4 (high), reflecting the local attack vector with low complexity and no user interaction required, but requiring high privileges. No vendor advisory or patch information is currently available.
Potential Impact
Successful exploitation allows a local privileged attacker to write out-of-bounds memory in the Keymaster trustlet, which may lead to memory corruption and compromise of device security functions. The vulnerability does not require user interaction and has high impact on confidentiality, integrity, and availability as per the CVSS vector.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, limit local privileged access to trusted users only.
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: 6aa13d61acd9273b49346501
Added to database: 09/09/2026, 11:05:05 UTC
Last enriched: 09/09/2026, 11:05:52 UTC
Last updated: 09/09/2026, 22:52:09 UTC
Views: 10
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.