Jumo: Insufficient entropy in PRNG may lead to root access
Priority LOW 33CWE-338Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00137 3rd percentileScored 2026-11-07
Fix Fixed variTRON300 (Jumo): 9.0.2.5variTRON500 (Jumo): 9.0.2.5+1 more product
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
- Fix · CNA variTRON300 (Jumo) Fixed in 9.0.2.5
- Fix · CNA variTRON500 (Jumo) Fixed in 9.0.2.5
- Fix · CNA variTRON500 touch (Jumo) Fixed in 9.0.2.5
Timeline
- 2026-10-02 Threatist record created from CVE-2025-41731
- 2026-10-03 Alias added: GHSA-cgg5-w2f8-858m
Sources
- CVE-2025-41731 · CVE Program
- CVE-2025-41731 · NVD
- FIRST EPSS
- GHSA-cgg5-w2f8-858m · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences