Is CVE-2021-27503 in the CISA KEV catalog?

No. CVE-2021-27503 is not currently on the CISA Known Exploited Vulnerabilities list.

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

CVE-2021-27503 has a CVSS v3 base score of 4.8 (MEDIUM).

What is the EPSS score for CVE-2021-27503?

CVE-2021-27503 has an EPSS score of 0.56% (43th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-27503?

Upgrade mylife to 1.7.5 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2021-27503

MEDIUM

4.8

CVSS v3

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 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.

CWE-798Hard-coded Credentials

How to fix

Remediation Available

mylifeNVD

Affected:< 1.7.5Fixed in:1.7.5CVE-2021-27503derived from NVD

mylife cloudNVD

Affected:< 1.7.2Fixed in:1.7.2CVE-2021-27503derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

0.56%probability of exploitation in 30 days

43rdpercentile

Moderate risk: more likely to be exploited than 43% of all known CVEs.

References

Third-Party Advisory1

us-cert.cisa.gov

Related Vulnerabilities

Other CWE-798 (Hard-coded Credentials) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2022-26138	Critical	9.8	98%	KEV	-
CVE-2024-3272	Critical	9.8	98%	KEV	-
CVE-2025-30406	Critical	9.0	94%	KEV	Fix
CVE-2024-28987	Critical	9.1	93%	KEV	Fix
CVE-2019-15976	Critical	9.8	93%	-	Fix
CVE-2024-20439	Critical	9.8	92%	KEV	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.