CVE-2026-94395

Medium

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).

SeverityMedium

CVSS6.8

Exploit probability—

ProductSafenet Authentication Client SIS token engine

PublishedNov 5, 2026

First seenNov 5, 2026

Weakness typeCWE-121CWE-121 CWE-787Out-of-bounds write CWE-1284CWE-1284

How to fix

Vendor advisories

supportportal.thalesgroup.com/csm?id=kb_article_view&sys_kb_id=7786064a2b905350cdc1f87df291bf92&sysparm_article=KB0031250

Affected products

Product	Affected versions	Fixed in
Thalesgroup Safenet Authentication Client SIS token engine	10.8 R7 ≤ v ≤ 10.9 R3 (build 10.9.7449)	—

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