Tangem SDK up to 5.18.2 on Android AttestationTask.kt comparison using wrong factors

CVSS Meta Temp Score
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CTI Interest Score
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2.8$0-$5k0.00

Summaryinfo

A vulnerability has been found in Tangem SDK up to 5.18.2 on Android and classified as problematic. Affected is an unknown function of the file operations/attestation/AttestationTask.kt. Performing a manipulation results in comparison using wrong factors. This vulnerability is identified as CVE-2025-27839. The attack is only possible with local access. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Tangem SDK up to 5.18.2 on Android. This affects an unknown part of the file operations/attestation/AttestationTask.kt. The manipulation with an unknown input leads to a comparison using wrong factors vulnerability. CWE is classifying the issue as CWE-1025. The code performs a comparison between two entities, but the comparison examines the wrong factors or characteristics of the entities, which can lead to incorrect results and resultant weaknesses. This is going to have an impact on integrity. The summary by CVE is:

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.

The advisory is shared at tangem.com. This vulnerability is uniquely identified as CVE-2025-27839 since 03/07/2025. The exploitability is told to be difficult. An attack has to be approached locally. Technical details are known, but no exploit is available.

Upgrading to version 5.18.3 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 24588188fdb51ed469cd59d2c595128c1fe63b07 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-7815). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 2.8
VulDB Meta Temp Score: 2.8

VulDB Base Score: 2.5
VulDB Temp Score: 2.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 3.2
CNA Vector (MITRE): 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Comparison using wrong factors
CWE: CWE-1025
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: SDK 5.18.3
Patch: 24588188fdb51ed469cd59d2c595128c1fe63b07

Timelineinfo

03/07/2025 🔍
03/08/2025 +1 days 🔍
03/08/2025 +0 days 🔍
06/08/2025 +91 days 🔍

Sourcesinfo

Advisory: tangem.com
Status: Confirmed

CVE: CVE-2025-27839 (🔍)
GCVE (CVE): GCVE-0-2025-27839
GCVE (VulDB): GCVE-100-299001
EUVD: 🔍
scip Labs: https://www.scip.ch/en/?labs.20130704

Entryinfo

Created: 03/08/2025 08:09
Updated: 06/08/2025 01:25
Changes: 03/08/2025 08:09 (68), 06/08/2025 01:25 (1)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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