Heap-based buffer overflow in KnoxVault trustlet prior to SMR Sep-2026 Release 1 allows local privileged attackers to execute arbitrary code. (CVE-2026-21104)
A heap-based buffer overflow vulnerability exists in the KnoxVault trustlet prior to the SMR Sep-2026 Release 1. This flaw allows local attackers with privileged access to execute arbitrary code on the affected system. The vulnerability requires high attack complexity and privileges, with no user interaction needed. No known exploits are reported in the wild at this time.
AI Analysis
Technical Summary
CVE-2026-21104 is a heap-based buffer overflow vulnerability in the KnoxVault trustlet component affecting versions prior to SMR Sep-2026 Release 1. The flaw enables local privileged attackers to execute arbitrary code. The vulnerability has a high severity rating and a CVSS 4.0 vector indicating local attack vector, high attack complexity, and high privileges required. No cloud service is involved, and no patch or vendor advisory details are currently provided.
Potential Impact
Successful exploitation allows local privileged attackers to execute arbitrary code, potentially compromising system integrity and security. The attack requires high privileges and complexity, limiting the attack surface to privileged local users. There are no reports of active exploitation in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict local privileged access to trusted users only and monitor for suspicious activity related to KnoxVault trustlet components.
Heap-based buffer overflow in KnoxVault trustlet prior to SMR Sep-2026 Release 1 allows local privileged attackers to execute arbitrary code. (CVE-2026-21104)
Description
A heap-based buffer overflow vulnerability exists in the KnoxVault trustlet prior to the SMR Sep-2026 Release 1. This flaw allows local attackers with privileged access to execute arbitrary code on the affected system. The vulnerability requires high attack complexity and privileges, with no user interaction needed. No known exploits are reported in the wild at this time.
CVSS v4.0
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-21104 is a heap-based buffer overflow vulnerability in the KnoxVault trustlet component affecting versions prior to SMR Sep-2026 Release 1. The flaw enables local privileged attackers to execute arbitrary code. The vulnerability has a high severity rating and a CVSS 4.0 vector indicating local attack vector, high attack complexity, and high privileges required. No cloud service is involved, and no patch or vendor advisory details are currently provided.
Potential Impact
Successful exploitation allows local privileged attackers to execute arbitrary code, potentially compromising system integrity and security. The attack requires high privileges and complexity, limiting the attack surface to privileged local users. There are no reports of active exploitation in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict local privileged access to trusted users only and monitor for suspicious activity related to KnoxVault trustlet components.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-xf28-mr99-6rv2
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-21104"]
- Ecosystems
- []
- Database Specific Severity
- HIGH
- Cvss Version
- 4.0
Threat ID: 6aa15f79acd9273b4961830d
Added to database: 09/09/2026, 13:30:33 UTC
Last enriched: 09/09/2026, 13:55:32 UTC
Last updated: 09/09/2026, 22:52:09 UTC
Views: 3
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