EUVD-2025-21137
2025-07-11
[email protected]
8.2
CVSS 3.1
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CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Lifecycle Timeline
3
Analysis Generated
Mar 16, 2026 - 08:18 vuln.today
EUVD ID Assigned
Mar 16, 2026 - 08:18 euvd
EUVD-2025-21137
CVE Published
Jul 11, 2025 - 16:15 nvd
HIGH 8.2
Tags
Description
A vulnerability in the Software SMI handler (SwSmiInputValue 0xB2) allows a local attacker to control the RBX register, which is used as an unchecked pointer in the CommandRcx0 function. If the contents at RBX match certain expected values (e.g., '$DB$' or '2DB$'), the function performs arbitrary writes to System Management RAM (SMRAM), leading to potential privilege escalation to System Management Mode (SMM) and persistent firmware compromise.
Analysis
A privilege escalation vulnerability (CVSS 8.2) that allows a local attacker. High severity vulnerability requiring prompt remediation.
Technical Context
Vulnerability type: privilege escalation. CVSS 8.2 indicates high severity.
Affected Products
['Unspecified product']
Remediation
Monitor vendor channels for patch availability.
Priority Score
41
Low
Medium
High
Critical
KEV: 0
EPSS: +0.0
CVSS: +41
POC: 0
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External POC / Exploit Code
Leaving vuln.today
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