Buffer overflow in Thalesgroup Safenet Authentication Client Sis Token Engine
CVE-2026-94395
A stack-based buffer overflow in Thales SafeNet Authentication Client (SAC) SIS token engine processing can be triggered by a malicious physical or software-emulated smart card. The issue can occur before authentication or PIN entry and may cause a denial of service or potentially arbitrary code execution with the privileges of the affected process. Affected releases start with SAC 10.8 R7 and include SAC 10.9 R3 GA (build 10.9.7449).
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- supportportal.thalesgroup.com/csm (vendor-advisory)
Frequently asked questions
- What is CVE-2026-94395?
- CVE-2026-94395 is a medium-severity vulnerability in Thalesgroup Safenet Authentication Client Sis Token Engine, classified under Stack-based Buffer Overflow. CVSS score: 6.8/10. Published 2026-11-05.
- How severe is CVE-2026-94395?
- Medium severity. CVSS v3 base score is 6.8 out of 10.