CVE-2021-27495Network attack vector

Password disclosure via HTTPS-to-HTTP login redirect

Published Jul 30, 2021 · Updated Aug 3, 2024

Credential exposure in Ypsomed mylife Cloud before 1.7.2 and mylife App before 1.7.5 allows attackers to intercept passwords. During login, the cloud service redirects the application from an HTTPS endpoint to an HTTP endpoint and reflects the user's password into the unencrypted exchange. A user must initiate login, and man-in-the-middle attackers can read the transmitted credential and potentially alter data in transit.

CVSS severity7.1
High
EPSS probability0.81%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Credential exposure in Ypsomed mylife Cloud before 1.7.2 and mylife App before 1.7.5 allows attackers to intercept passwords. During login, the cloud service redirects the application from an HTTPS endpoint to an HTTP endpoint and reflects the user's password into the unencrypted exchange. A user must initiate login, and man-in-the-middle attackers can read the transmitted credential and potentially alter data in transit.

The record

CVE
CVE-2021-27495
Published
Jul 30, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-522, T1557
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 30, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.3CISA ICS-CERTCVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N
7.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
5.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-522Insufficiently Protected Credentials
T1557Adversary-in-the-Middle

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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