Thales Authentication Client up to 10.9 R3 SIS token engine stack-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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4.4$0-$5k1.30+

Summaryinfo

A vulnerability was found in Thales Authentication Client up to 10.9 R3 and classified as problematic. Affected by this vulnerability is an unknown functionality of the component SIS token engine. Executing a manipulation can lead to stack-based overflow. This vulnerability is handled as CVE-2026-94395. It is possible to launch the attack on the local host. There is not any exploit available.

Detailsinfo

A vulnerability classified as problematic was found in Thales Authentication Client up to 10.9 R3. This vulnerability affects an unknown code of the component SIS token engine. The manipulation with an unknown input leads to a stack-based overflow vulnerability. The CWE definition for the vulnerability is CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). As an impact it is known to affect integrity, and availability. CVE summarizes:

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).

The advisory is shared for download at supportportal.thalesgroup.com. This vulnerability was named CVE-2026-94395 since 09/21/2026. The exploitation appears to be easy. The attack needs to be approached locally. There are neither technical details nor an exploit publicly available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.4

VulDB Base Score: 4.4
VulDB Temp Score: 4.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Yes
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

09/21/2026 CVE reserved
11/05/2026 +45 days Advisory disclosed
11/05/2026 +0 days VulDB entry created
11/05/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: supportportal.thalesgroup.com
Status: Not defined

CNA: THA-PSIRT
CVE: CVE-2026-94395 (🔒)

GCVE (CVE): GCVE-0-2026-94395
GCVE (VulDB): GCVE-100-431596

Entryinfo

Created: 11/05/2026 19:40
Changes: 11/05/2026 19:40 (64)
Complete: 🔍
Cache ID: 216::103

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