CVE-2025-41731
Jumo: Insufficient entropy in PRNG may lead to root access
Description
A vulnerability was identified in the password generation algorithm when accessing the debug-interface. An unauthenticated local attacker with knowledge of the password generation timeframe might be able to brute force the password in a timely manner and thus gain root access to the device if the debug interface is still enabled.
INFO
Published Date :
Nov. 10, 2025, 8:15 a.m.
Last Modified :
Oct. 18, 2026, 9:10 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | 270ccfa6-a436-4e77-922e-914ec3a9685c | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | MITRE-CVE |
Solution
- Disable the debug interface if not needed.
- Review and improve the password generation algorithm.
- Ensure password generation is not time-bound.
- Implement rate limiting for authentication attempts.
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-2025-41731.
| URL | Resource |
|---|---|
| https://jumo.csaf-tp.certvde.com/.well-known/csaf/white/2025/vde-2025-086.json |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-41731 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-2025-41731
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).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-41731 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-41731 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]
Oct. 18, 2026
Action Type Old Value New Value Added Translation Title: variTRON300, variTRON500 y variTRON500 touch de Jumo, Description: Una vulnerabilidad fue identificada en el algoritmo de generación de contraseñas al acceder a la interfaz de depuración. Un atacante local no autenticado con conocimiento del marco de tiempo de generación de contraseñas podría ser capaz de forzar la contraseña por fuerza bruta de manera oportuna y así obtener acceso de root al dispositivo si la interfaz de depuración todavía está habilitada. -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Jumo', 'product': 'variTRON300', 'versions': [{'status': 'affected', 'version': '0.0.0.0', 'lessThan': '9.0.2.5', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'Jumo', 'product': 'variTRON500', 'versions': [{'status': 'affected', 'version': '0.0.0.0', 'lessThan': '9.0.2.5', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'Jumo', 'product': 'variTRON500 touch', 'versions': [{'status': 'affected', 'version': '0.0.0.0', 'lessThan': '9.0.2.5', '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-2025-41731', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2025-11-10T15:18:58.302257Z'} -
New CVE Received by [email protected]
Nov. 10, 2025
Action Type Old Value New Value Added Description A vulnerability was identified in the password generation algorithm when accessing the debug-interface. An unauthenticated local attacker with knowledge of the password generation timeframe might be able to brute force the password in a timely manner and thus gain root access to the device if the debug interface is still enabled. Added CVSS V3.1 AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-338 Added Reference https://jumo.csaf-tp.certvde.com/.well-known/csaf/white/2025/vde-2025-086.json