CVE-2025-41731 json
Jumo: Insufficient entropy in PRNG may lead to root access
published 2025-11-10 11 mo ago modified 2026-10-18 21 d ago also EUVD-2025-44036
- cvss
- 7.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.1%
- EPSS 0.1% chance of exploitation in 30 days, percentile 3%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- Jumo variTRON300 9.0.2.5
- Jumo variTRON500 9.0.2.5
- Jumo variTRON500 touch 9.0.2.5
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 11 mo ago
Exploit prediction
0.14% chance of exploitation in the next 30 days, higher than 3% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.4 | CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
- Jumo variTRON300
- Jumo variTRON500
- Jumo variTRON500 touch
Classification
- Weakness
-
- CWE-338 Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
References
Sources
- CVE List CVE-2025-41731
- NVD CVE-2025-41731
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