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CVE-2021-34600

MediumPublished

Telenot complex: Insecure AES Key Generation

Published: Jan 20, 2022
Updated: Sep 16, 2024
Assigning CNA: CERTVDE
Evidence observed: Aug 25, 2026

Primary CVSS

5.5/ 10Medium

nvd · CVSS 3.1

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS probability estimate

0.4%

Low · next 30 days

Percentile: 35.3%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

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.

Sources

CVE-2021-34600PoC
Proof-of-concept exploit for CVE-2021-34600, demonstrating a key generation vulnerability in Telenot access control systems using Proxmark3 RFID hardware.

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