Security readout for executives and security teams
Plain-English summary
CVE-2021-27491 is a credential-protection flaw in Ypsomed mylife Cloud and mylife Mobile Application. The public record says the cloud service disclosed password hashes during registration. That can create account-compromise risk if exposed hashes are captured and later cracked or reused.
Executive priority
Treat as a focused credential-exposure risk. Prioritize version verification and upgrade completion, especially where the application supports patient or regulated medical workflows. No source confirms active exploitation.
Technical view
The issue is mapped to CWE-522 and affects Ypsomed mylife Cloud versions before 1.7.2 and mylife App versions before 1.7.5. The source bundle does not provide CVSS details, exploit prerequisites, or deeper protocol behavior beyond password-hash disclosure during registration.
Likely exposure
Exposure is likely limited to organizations or users using affected Ypsomed mylife Cloud or mylife App versions before the listed fixed thresholds.
Exploitation context
CISA KEV is false, and the supplied sources do not state active exploitation or public weaponization. Evidence is incomplete on attack complexity, required access, and whether registration traffic exposure required authentication or network position.
Researcher notes
The public bundle is sparse: no CVSS vector, no detailed technical advisory text, and no exploit status beyond non-KEV. Avoid assuming broader product impact outside the named Ypsomed mylife Cloud and App versions.
Mitigation direction
- Upgrade mylife Cloud to version 1.7.2 or later.
- Upgrade mylife App to version 1.7.5 or later.
- Review CISA and vendor guidance for any additional medical-device instructions.
- Assess password resets for accounts registered while vulnerable.
- Monitor for suspicious account activity tied to affected users.
Validation and detection
- Inventory deployed mylife Cloud and App versions.
- Confirm no production instance remains below the fixed versions.
- Check registration workflows after update for password-hash exposure.
- Review registration-period logs for unusual account or access activity.
- Document affected populations and remediation dates.
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-522: 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 lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-27491 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.
Insufficiently Protected Credentials
Insufficiently Protected Credentials represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.