CVE-2025-8699
CRITICAL EPSS 49.0%
Published Sep 12, 20259mo ago · Modified Jun 17, 20262w ago
9.1 CVSS 3.1
Published Sep 12, 2025 9mo ago
Last Modified Jun 17, 2026 2w ago
Description
Some "Stored Value" Unattended Payment Solutions of KioSoft use vulnerable NFC cards. Attackers could potentially use this vulnerability to change the balance on the cards and generate money. The account balance is stored on an insecure MiFare Classic NFC card and can be read and written back. By carefully observing changes in card dumps, one can identify fields that store the cash value of the card. Additionally, a checksum can be identified, which is created by XOR-ing the cash and an unknown field with a certain value. By updating the fields accordingly, arbitrary amounts of money can be loaded onto the card (up to $655,35) to pay for goods.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability None
Threat Intelligence
EPSS Exploit Probability
49.0% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-922
References 2
- seclists.org http://seclists.org/fulldisclosure/2025/Sep/33
- r.sec-consult.com https://r.sec-consult.com/kiosoft
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.