CVE-2025-27839 – Tangem SDK Offline Wallet Attestation Verification Bypass

The following table lists the changes that have been made to the
CVE-2025-27839 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by [email protected]

    Mar. 08, 2025

    Action Type Old Value New Value
    Added Description operations/attestation/AttestationTask.kt in the Tangem SDK before 5.18.3 for Android has a logic flow in offline wallet attestation (genuineness check) that causes verification results to be disregarded during the first scan of a card. Exploitation may not have been possible.
    Added CVSS V3.1 AV:L/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N
    Added CWE CWE-1025
    Added Reference https://github.com/tangem/tangem-sdk-android/commit/24588188fdb51ed469cd59d2c595128c1fe63b07
    Added Reference https://github.com/tangem/tangem-sdk-android/releases/tag/release-app_5.18-409
    Added Reference https://tangem.com/en/blog/post/app-update/
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