How severe is CVE-2021-27503?

CVE-2021-27503 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-27503 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-27503?

CVE-2021-27503 primarily affects Ypsomed Mylife. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-27503?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-27503 published?

CVE-2021-27503 was published on 2021-08-02 and last updated on 2026-06-17.

CVE-2021-27503

CVE-2021-27503 is a medium-severity vulnerability in Ypsomed Mylife with a CVSS 3.x base score of 4.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-798.

Key facts

Severity: Medium (CVSS 3.x base score 4.8)
CVSS v2: 5.8
EPSS exploit prediction: 1% (43rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-798
Affected product: Ypsomed Mylife
Published: 2021-08-02
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2021-27503?: 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.
How severe is CVE-2021-27503?: CVE-2021-27503 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-27503 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-27503?: CVE-2021-27503 primarily affects Ypsomed Mylife. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-27503?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-27503 published?: CVE-2021-27503 was published on 2021-08-02 and last updated on 2026-06-17.

References

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

Affected products (2)

cpe:2.3:a:ypsomed:mylife:*:*:*:*:*:*:*:*
cpe:2.3:a:ypsomed:mylife_cloud:*:*:*:*:*:*:*:*

More vulnerabilities in Ypsomed Mylife

CVE-2021-27491 — High (CVSS 7.5): Ypsomed mylife Cloud, mylife Mobile Application:Ypsomed mylife Cloud,All versions prior to 1.7.2,Ypsomed mylife App,All…
CVE-2021-27495 — High (CVSS 7.1): Ypsomed mylife Cloud, mylife Mobile Application:Ypsomed mylife Cloud,All versions prior to 1.7.2,Ypsomed mylife App,All…
CVE-2021-27499 — Medium (CVSS 5.9): Ypsomed mylife Cloud, mylife Mobile Application, Ypsomed mylife Cloud: All versions prior to 1.7.2, Ypsomed mylife App:…

All CVEs affecting Ypsomed Mylife →

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