CVE-2025-4275
SecureFlashDxe: Incorrect UEFI variable attributes check allows usage of invalid certificate
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
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 8338d8cb-57f7-4252-abc0-96fd13e98d21 |
Solution
- Apply vendor firmware updates.
- Ensure digital signature validation is robust.
- Mitigate NVRAM variable manipulation.
Public PoC/Exploit Available at Github
CVE-2025-4275 has a 5 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).
Forked from https://github.com/0xor0ne/awesome-list.git
Forked from https://github.com/0xor0ne/awesome-list.git
Binaries, drivers, PoCs and other stuff on Hydroph0bia vulnerability (CVE-2025-4275)
CMake C Batchfile NSIS
Cybersecurity oriented awesome list
awesome awesome-list cybersecurity exploitation reverse-engineering
📡 PoC auto collect from GitHub. ⚠️ Be careful Malware.
security cve exploit poc vulnerability
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
-
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
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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
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/