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High · 7.0 CVE-2026-94395 EUVD-2026-117636GHSA-8fgg-vqqx-jmfx

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

Published Nov 5, 2026 · Updated Nov 5, 2026 · Assigned by THA-PSIRT

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).

Affected products

VendorProductAffectedFixed
Thalesgroup Safenet Authentication Client SIS token engine 10.8 R7 – ≤ 10.9 R3 (build 10.9.7449) —

References