CVE-2026-94395

Stack-based buffer overflow in SafeNet Authentication Client SIS token engine

Published Nov 5, 2026 CVSS 4.0 · 7 High EPSS < 1% KEV · Not listed
Description
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).

Remediation

Vendor Solution

Upgrade to SafeNet Authentication Client 10.9 R3 Post GA (build 10.9.7954) or later.

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Thalesgroup safenet Authentication Client
Vendors & Products Thalesgroup safenet Authentication Client
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 6.8, 'vector': 'CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Type Values Removed Values Added
Description 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).
Title Stack-based buffer overflow in SafeNet Authentication Client SIS token engine
First Time appeared Thalesgroup
Thalesgroup safenet Authentication Client Sis Token Engine
Weaknesses CWE-121
CWE-1284
CWE-787
CPEs cpe:2.3:a:thalesgroup:safenet_authentication_client_sis_token_engine:*:*:windows:*:*:*:*:*
Vendors & Products Thalesgroup
Thalesgroup safenet Authentication Client Sis Token Engine
References
Metrics cvssV4_0

{'score': 7, 'vector': 'CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
THA-PSIRT
Published
Updated
Nov 5, 2026, 7:08 PM
Reserved
Sep 21, 2026, 1:29 PM
Status
Awaiting Analysis
Published
Nov 5, 2026, 7:17 PM
Modified
Nov 6, 2026, 9:33 PM
Severity
Moderate
Public date
Nov 5, 2026, 6:12 PM