Is CVE-2021-27503 actively exploited?

No active exploitation of CVE-2021-27503 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-27503 be exploited remotely?

Yes. CVE-2021-27503 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-27503?

CVE-2021-27503 has a CVSS score of 4.8 (MEDIUM).

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MEDIUM

CVE-2021-27503

CWE-798Published: August 2, 2021· Updated: Jun 17, 2026

4.8

CVSS v3.1

Official 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 encrypts on the application layer of the communication protocol between the Ypsomed mylife App and mylife Cloud credentials based on hard-coded secrets, which allows man-in-the-middle attackers to tamper with messages.

NVD Source

Technical Analysis

CVE-2021-27503 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.