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CVE-2026-94395— Stack-based buffer overflow in SafeNet Authentication Client SIS token engine

Quick assessment

Affected

Thalesgroup Safenet Authentication Client SIS token engine

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Thales SafeNet Authentication Client（SAC）的 SIS 令牌引擎在处理智能卡时存在基于栈的缓冲区溢出漏洞。该漏洞可被恶意的物理智能卡或软件模拟的智能卡触发。问题可能在身份验证或 PIN 码输入之前发生，可能导致拒绝服务（DoS）攻击，或在受影响进程的权限下执行任意代码。受影响的版本从 SAC 10.8 R7 开始，包括 SAC 10.9 R3 GA（构建版本 10.9.7449）。

CVSS 7.0 · High Updated Nov 06, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

Vendor	Product	Version Range	Status
Thalesgroup	Safenet Authentication Client SIS token engine	`10.8 R7≤ 10.9 R3 (build 10.9.7449)`	affected

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Vulnerability Information

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Vulnerability Title

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

Source: CVE Program / CVE List V5

Vulnerability 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).

Source: CVE Program / CVE List V5

CVSS Information

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

Source: CVE Program / CVE List V5

Vulnerability Type

CWE-1284

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
Thalesgroup	Safenet Authentication Client SIS token engine	10.8 R7 ~ 10.9 R3 (build 10.9.7449)	-

II. Public POCs for CVE-2026-94395

#	POC Description	Source Link	Shenlong Link

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No public POC found.

III. Intelligence Information for CVE-2026-94395

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Other References for CVE-2026-94395 (1)

https://supportportal.thalesgroup.com/csm?id=kb_article_view&sys_kb_id=7786064a2b905350cdc1f87df291bf92&sysparm_article=KB0031250 vendor-advisory

https://www.cve.org/CVERecord?id=CVE-2026-94395

Same Patch Batch · Thalesgroup · 2026-11-05 · 3 CVEs total

CVE-2026-112109	7.3 HIGH	Local privilege escalation in SafeNet Authentication Client SACSrv
CVE-2026-112110	5.8 MEDIUM	Privileged file deletion in SafeNet Authentication Client SACSrv

IV. Related Vulnerabilities

Same vendor: Thalesgroup

Same weakness: CWE-1284