CVE-2026-20753

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Summary

CVECVE-2026-20753
StatePUBLISHED
Assignerintel
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-12 17:16:17 UTC
Updated2026-05-12 17:16:17 UTC
DescriptionInteger overflow in the UEFI firmware for the Slim Bootloader may allow an escalation of privilege. System software adversary with a privileged user combined with a low complexity attack may enable local code execution. This result may potentially occur via local access when attack requirements are present without special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (high), integrity (high) and availability (high) of the vulnerable system, resulting in subsequent system confidentiality (high), integrity (high) and availability (high) impacts.

Risk And Classification

Primary CVSS: v4.0 8.7 HIGH from [email protected]

CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Problem Types: CWE-190 | Escalation of Privilege | CWE-190 Integer Overflow or Wraparound

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary8.7HIGHCVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/C...
4.0CNACVSS8.7HIGHCVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

CVSS v4.0 Breakdown

Attack Vector
Local
Attack Complexity
Low
Attack Requirements
Present
Privileges Required
High
User Interaction
None
Confidentiality
High
Integrity
High
Availability
High
Sub Conf.
High
Sub Integrity
High
Sub Availability
High

CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na Slim Bootloader May Allow An Escalation Of Privilege. System Software Adversary With A Privileged User Combined With A Low Complexity Attack May Enable Local Code Execution. This Result May Potentially Occur Via Local Access When Attack Requirements Are Present Without Special Internal Knowledge And Requires No User Interaction. The Potential Vulnerability May Impact The Confidentiality High Integrity High And Availability High Of The Vulnerable System Resulting In Subsequent System Confidentiality High Integrity High And Availability High Impacts. affected See references Not specified

References

ReferenceSourceLinkTags
intel.com/content/www/us/en/security-center/advisory/intel-sa-01425.html [email protected] intel.com
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NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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