CVE-2025-27839
Tangem SDK Offline Wallet Attestation Verification Bypass
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.
INFO
Published Date :
March 8, 2025, 12:15 a.m.
Last Modified :
June 17, 2026, 9:04 a.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | LOW | [email protected] |
Solution
- Update Tangem SDK to version 5.18.3 or later.
- Verify the integrity of the attestation process.
- Test the offline wallet attestation feature.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-27839.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-27839 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-27839
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-27839 vulnerability anywhere in the article.
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.
-
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Tangem', 'product': 'SDK', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '5.18.3', 'versionType': 'custom'}], 'platforms': ['Android'], 'defaultStatus': 'unaffected'}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2025-27839', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2025-03-10T17:19:00.674527Z'} -
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/