7.8
HIGH CVSS 3.1
CVE-2025-4275
Insyde BIOS UEFI Bootloader Execution
Description

A vulnerability in the digital signature verification process does not properly validate variable attributes which allows an attacker to bypass signature verification by creating a non-authenticated NVRAM variable. An attacker may to execute arbitrary signed UEFI code and bypass Secure Boot.

INFO

Published Date :

June 11, 2025, 1:15 a.m.

Last Modified :

July 30, 2025, 8:15 a.m.

Remotely Exploit :

No

Source :

8338d8cb-57f7-4252-abc0-96fd13e98d21
Affected Products

The following products are affected by CVE-2025-4275 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

No affected product recoded yet

CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 HIGH 8338d8cb-57f7-4252-abc0-96fd13e98d21
Public PoC/Exploit Available at Github

CVE-2025-4275 has a 2 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2025-4275.

URL Resource
https://www.insyde.com/security-pledge/sa-2025002/
https://www.kb.cert.org/vuls/id/211341
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-4275 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2025-4275 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Binaries, drivers, PoCs and other stuff on Hydroph0bia vulnerability (CVE-2025-4275)

CMake C Batchfile NSIS

Updated: 1 month ago
27 stars 11 fork 11 watcher
Born at : June 10, 2025, 11:24 a.m. This repo has been linked 1 different CVEs too.

📡 PoC auto collect from GitHub. ⚠️ Be careful Malware.

security cve exploit poc vulnerability

Updated: 6 hours, 8 minutes ago
7213 stars 1201 fork 1201 watcher
Born at : Dec. 8, 2019, 1:03 p.m. This repo has been linked 805 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2025-4275 vulnerability anywhere in the article.

  • The Hacker News
Microsoft Patches 67 Vulnerabilities Including WEBDAV Zero-Day Exploited in the Wild

Microsoft has released patches to fix 67 security flaws, including one zero-day bug in Web Distributed Authoring and Versioning (WEBDAV) that it said has come under active exploitation in the wild. Of ... Read more

Published Date: Jun 11, 2025 (2 months, 2 weeks ago)
  • Daily CyberSecurity
Ivanti Patches High-Severity Credential Decryption Flaws in Workspace Control

Ivanti has released critical security updates addressing three high-severity vulnerabilities in Ivanti Workspace Control (IWC)—a widely-used tool for centralized desktop and application management in ... Read more

Published Date: Jun 11, 2025 (2 months, 2 weeks ago)
  • Daily CyberSecurity
Insyde UEFI Flaw (CVE-2025-4275): Secure Boot Bypass Allows Rootkits & Undetectable Malware

A newly disclosed vulnerability in Insyde H2O UEFI firmware, tracked as CVE-2025-4275, allows attackers to bypass Secure Boot protections by injecting rogue digital certificates into a poorly protecte ... Read more

Published Date: Jun 11, 2025 (2 months, 2 weeks ago)

The following table lists the changes that have been made to the CVE-2025-4275 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by 8338d8cb-57f7-4252-abc0-96fd13e98d21

    Jul. 30, 2025

    Action Type Old Value New Value
    Changed Description Running the provided utility changes the certificate on any Insyde BIOS and then the attached .efi file can be launched. A vulnerability in the digital signature verification process does not properly validate variable attributes which allows an attacker to bypass signature verification by creating a non-authenticated NVRAM variable. An attacker may to execute arbitrary signed UEFI code and bypass Secure Boot.
  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Jun. 11, 2025

    Action Type Old Value New Value
    Added Reference https://www.kb.cert.org/vuls/id/211341
  • New CVE Received by 8338d8cb-57f7-4252-abc0-96fd13e98d21

    Jun. 11, 2025

    Action Type Old Value New Value
    Added Description Running the provided utility changes the certificate on any Insyde BIOS and then the attached .efi file can be launched.
    Added CVSS V3.1 AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
    Added Reference https://www.insyde.com/security-pledge/sa-2025002/
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 7.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact