CVE-2026-40639
Dell Client Platform BIOS Weak Encoding Password Elevation of Privilege
Description
Dell Client Platform BIOS contains a Weak Encoding for Password vulnerability. An unauthenticated attacker with physical access could potentially exploit this vulnerability, leading to Elevation of Privileges.
INFO
Published Date :
June 9, 2026, 7:17 p.m.
Last Modified :
July 23, 2026, 9:10 a.m.
Remotely Exploit :
No
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-40639
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.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | c550e75a-17ff-4988-97f0-544cde3820fe | ||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update Dell Client Platform BIOS.
- Ensure BIOS passwords are strong.
- Restrict physical access to the system.
Public PoC/Exploit Available at Github
CVE-2026-40639 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-2026-40639.
| URL | Resource |
|---|---|
| https://www.dell.com/support/kbdoc/en-us/000453482/dsa-2026-197 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-40639 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-2026-40639
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).
Public copy of the slide deck for the unlocked and leaked talk.
HTML CSS JavaScript
Tooling for extracting and clearing passwords from Dell BIOS flash, released as part of the 'Unlocked and Leaked' talk.
Rust
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-40639 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-40639 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 Translated by [email protected]
Jul. 23, 2026
Action Type Old Value New Value Added Translation Title: varios productor Dell, Description: Dell Client Platform BIOS contiene una vulnerabilidad de codificación débil para contraseñas. Un atacante no autenticado con acceso físico podría potencialmente explotar esta vulnerabilidad, lo que podría llevar a una Elevación de Privilegios. -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Dell', 'product': 'Dell Edge Gateway 3000', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '1.26.0', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'Dell', 'product': 'Dell Edge Gateway 5000', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '1.36.0', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'Dell', 'product': 'DELL EMBEDDED PC 3000', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '1.32.0', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'Dell', 'product': 'DELL EMBEDDED PC 5000', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '1.33.0', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'Dell', 'product': 'Dell Precision 3630 Tower', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '2.40.0', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'Dell', 'product': 'Dell Precision 3930 Rack', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '2.43.0', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'Dell', 'product': 'Latitude 7220 Rugged Extreme', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '1.51.0', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'Dell', 'product': 'Latitude Rugged 5420', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '1.42.0', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'Dell', 'product': 'Latitude Rugged 5424', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '1.42.0', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'Dell', 'product': 'Latitude Rugged 7220EX', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '1.51.0', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'Dell', 'product': 'Latitude Rugged 7424', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '1.42.0', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'Dell', 'product': 'Precision 3930 Rack', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '2.43.0', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-40639', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-09T18:58:36.468011Z'} -
New CVE Received by [email protected]
Jun. 09, 2026
Action Type Old Value New Value Added Description Dell Client Platform BIOS contains a Weak Encoding for Password vulnerability. An unauthenticated attacker with physical access could potentially exploit this vulnerability, leading to Elevation of Privileges. Added CVSS V3.1 AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N Added CWE CWE-261 Added Reference https://www.dell.com/support/kbdoc/en-us/000453482/dsa-2026-197