CVE-2025-20096

Local privilege escalation

Published Mar 10, 2026 · Updated Mar 10, 2026

Improper input validation in Intel UEFI Reference Firmware allows local users to escalate privileges through manipulated system data. Intel has not disclosed the affected firmware component, rejected input constraint, or operation that accepts the invalid data. Exploitation requires high attack complexity, existing high privileges, active user interaction, and additional attack requirements, and can compromise firmware-controlled integrity and availability.

CVSS severity5.9
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Intel UEFI Reference Firmware allows local users to escalate privileges through manipulated system data. Intel has not disclosed the affected firmware component, rejected input constraint, or operation that accepts the invalid data. Exploitation requires high attack complexity, existing high privileges, active user interaction, and additional attack requirements, and can compromise firmware-controlled integrity and availability.

The record

CVE
CVE-2025-20096
Published
Mar 10, 2026
Updated
Mar 10, 2026
Vendor
Topcon Positioning Systems, Inc.
Product
Intel UEFI Reference Firmware
Classifications
CWE-20, T1542.001
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Mar 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=See references

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Topcon Positioning Systems, Inc. · Intel UEFI Reference Firmwareversion=See references

Published CVSS scores

5.9Intel CorporationCVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:A/VC:N/VI:H/VA:H/SC:N/SI:H/SA:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1542.001Pre-OS Boot: System Firmware

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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