Security readout for executives and security teams
Plain-English summary
CVE-2021-27503 affects older Ypsomed mylife Cloud and mylife App versions. The app used hard-coded secrets for application-layer encryption, so someone positioned between the app and cloud could tamper with messages. The public bundle does not provide CVSS, exploit evidence, or detailed business impact.
Executive priority
Prioritize remediation where the affected app or cloud service is in operational use. The main concern is integrity of app-to-cloud communication, but urgency is tempered by missing CVSS data and no confirmed exploitation in the bundle.
Technical view
The issue is CWE-798: hard-coded secrets in the communication protection between Ypsomed mylife App and mylife Cloud. A man-in-the-middle attacker could tamper with messages. Affected ranges are mylife Cloud before 1.7.2 and mylife App before 1.7.5.
Likely exposure
Exposure is limited to environments or users relying on affected Ypsomed mylife Cloud or mylife App versions. The attacker needs a man-in-the-middle position on communications between the mobile app and cloud service.
Exploitation context
The source bundle states man-in-the-middle tampering is possible. It does not state public exploit availability, observed exploitation, or CISA KEV listing. Treat active exploitation as unconfirmed.
Researcher notes
The public data is sparse: affected versions, CWE-798, and MITM message tampering are stated. No CVSS vector, exploit maturity, patch notes, or technical protocol details are included in the supplied bundle.
Mitigation direction
- Upgrade mylife App to version 1.7.5 or later.
- Ensure mylife Cloud is on version 1.7.2 or later.
- Check Ypsomed and CISA guidance for any deployment-specific remediation.
- Limit use of untrusted networks until affected versions are remediated.
Validation and detection
- Inventory deployed mylife App versions against the affected range.
- Confirm mylife Cloud version or vendor-managed service status.
- Review mobile fleet records for users below version 1.7.5.
- Document whether network controls reduce man-in-the-middle exposure.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-798: Credential and account abuse lookup
Authentication and credential weaknesses can make valid-account abuse and credential telemetry useful review starting points. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-27503 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://us-cert.cisa.gov/ics/advisories/icsma-21-196-01CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Use of Hard-coded Credentials
Use of Hard-coded Credentials represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.