How severe is CVE-2021-27499?

CVE-2021-27499 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2021-27499 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-27499?

CVE-2021-27499 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-2021-27499?

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

When was CVE-2021-27499 published?

CVE-2021-27499 was published on 2021-08-02 and last updated on 2026-06-17.

CVE-2021-27499

CVE-2021-27499 is a medium-severity vulnerability in Ypsomed Mylife with a CVSS 3.x base score of 5.9. 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-330.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
CVSS v2: 4.3
EPSS exploit prediction: 0% (38th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-330
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 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.

Frequently asked questions

What is CVE-2021-27499?: 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.
How severe is CVE-2021-27499?: CVE-2021-27499 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2021-27499 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-27499?: CVE-2021-27499 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-2021-27499?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-27499 published?: CVE-2021-27499 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-2021-27503 — Medium (CVSS 4.8): 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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