CVE-2021-34600 json
Telenot complex: Insecure AES Key Generation
published 2022-01-20 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-21250
- cvss
- 5.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 36%
- public exploits
- 0
- none known
Summary
Telenot CompasX versions prior to 32.0 use a weak seed for random number generation leading to predictable AES keys used in the NFC tags used for local authorization of users. This may lead to total loss of trustworthiness of the installation.
Patch / fix
- Telenot Electronic GmbH CompasX 32.0
Exploit prediction
0.41% chance of exploitation in the next 30 days, higher than 36% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- x41-dsec.de https://www.x41-dsec.de/lab/advisories/x41-2021-003-telenot-complex-insecure-keygen/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
| NVD | 2.0 | 4.9 | AV:L/AC:L/Au:N/C:C/I:N/A:N |
Affected products
- Telenot Electronic GmbH CompasX
Classification
- Weakness
-
- CWE-335 Incorrect Usage of Seeds in Pseudo-Random Number Generator (PRNG)
References
-
x41-dsec.de
/lab/advisories/x41-2021-003-telenot-complex-insecure-keygen/
exploit, third-party-advisory
Sources
- CVE List CVE-2021-34600
- NVD CVE-2021-34600
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