CVE-2021-27499

Published: Aug 2, 2021Modified: Jun 17, 2026

5.9

Vector

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

Exploitability: 2.2 / Impact: 3.6

Source: NVD

Description

Ypsomed mylife Cloud, mylife Mobile Application, Ypsomed mylife Cloud: All versions prior to 1.7.2, Ypsomed mylife App: All versions prior to 1.7.5,The application layer encryption of the communication protocol between the Ypsomed mylife App and mylife Cloud uses non-random IVs, which allows man-in-the-middle attackers to tamper with messages.

Affected (2)

Products: Ypsomed: Mylife, Mylife Cloud

2 products

Configuration A

2 vulnerable

Vulnerable Software	Affected Versions
Ypsomed Mylife	Before 1.7.5
Ypsomed Mylife Cloud	Before 1.7.2

Related CWEs

Generation of Predictable IV with CBC Mode

The product generates and uses a predictable initialization Vector (IV) with Cipher Block Chaining (CBC) Mode, which causes algorithms to be susceptible to dictionary attacks when they are encrypted under the same key.

Use of Insufficiently Random Values

The product uses insufficiently random numbers or values in a security context that depends on unpredictable numbers.

References (2)

https://us-cert.cisa.gov/ics/advisories/icsma-21-196-01

Source: ics-cert@hq.dhs.gov

Third Party AdvisoryUS Government Resource

https://us-cert.cisa.gov/ics/advisories/icsma-21-196-01

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party AdvisoryUS Government Resource

Timeline

No history available yet.