Stack-based buffer overflow in SafeNet Authentication Client SIS token engine
Summary
| CVE | CVE-2026-94395 |
|---|---|
| State | PUBLISHED |
| Assigner | THA-PSIRT |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-11-05 19:17:28 UTC |
| Updated | 2026-11-06 21:33:01 UTC |
| 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). |
Risk And Classification
Primary CVSS: v4.0 7 HIGH from [email protected]
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS: 0.002500000 probability, percentile 0.163920000 (date 2026-11-08)
Problem Types: CWE-121 | CWE-787 | CWE-1284 | CWE-1284 CWE-1284 Improper validation of specified quantity in input | CWE-787 CWE-787 Out-of-bounds write | CWE-121 CWE-121 Stack-based buffer overflow
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | [email protected] | Secondary | 7 | HIGH | 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/E:X/C... |
| 4.0 | CNA | CVSS | 7 | HIGH | 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 |
| 3.1 | ADP | DECLARED | 6.8 | MEDIUM | CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | Secondary | 6.8 | MEDIUM | CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
CVSS v4.0 Breakdown
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS v3.1 Breakdown
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Thalesgroup | Safenet Authentication Client SIS Token Engine | affected 10.8 R7 10.9 R3 (build 10.9.7449) custom | Windows |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| supportportal.thalesgroup.com/csm | [email protected] | supportportal.thalesgroup.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Jonas Lejon, Triop AB (en)
Additional Advisory Data
Solutions
CNA: Upgrade to SafeNet Authentication Client 10.9 R3 Post GA (build 10.9.7954) or later.