CVE-2026-94395

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

Products / packages Thalesgroup Safenet Authentication Client SIS token engine

Published 05/11/2026, 18:12:54 UTC

Severity and exploitation

Not in CISA KEV

KEV coverage does not rule out exploitation.

KEV checked 14/11/2026, 22:55:31 UTC

THA-PSIRT · CVSS:4.0 · 7

Assessment vector

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

CISA-ADP · CVSS:3.1 · 6.8

Assessment vector

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

The headline uses the highest imported catalog score. Assessments can differ by source and CVSS version.

Severity

high7.0

CVSS measures technical severity, not the likelihood of an attack.

Known exploitation

Not listed in the checked CISA KEV catalog

Absence from CISA KEV does not rule out attacks.

Public exploit

Not established by this record

Missing evidence does not mean no public exploit exists.

Remediation

Source guidance available

Review the recorded instructions. Guidance may be a workaround rather than a fixed version.

What this means

A stack-based buffer overflow in Thales SafeNet Authentication Client SIS token engine can be triggered by a malicious smart card, potentially causing a denial of service or arbitrary code execution. Affected versions start with SAC 10.8 R7 and include SAC 10.9 R3 GA. A malicious physical or software-emulated smart card is required.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

Attack conditions

No attack-condition excerpt has been identified here. Review the full source description and references for authentication, network access, and configuration requirements.

Review supporting sources →

Affected versions

Check the exact model, release, and any platform requirements against your installation.

Thalesgroup · THA-PSIRT

Safenet Authentication Client SIS token engine

1 range

THA-PSIRT version evidence

Platforms: Windows

Check a product version

Compare with this publisher’s ranges. This does not inspect your installation.

affected

10.8 R7 → through 10.9 R3 (build 10.9.7449)

custom versions

Other versions: unaffected

Automatic dependency matching is unavailable for this record. Use the product evidence and publisher’s instructions to check your installation.

What to do

Compare your installed product and version with the affected versions above. A matching product name alone does not confirm exposure.

Upgrade to SafeNet Authentication Client 10.9 R3 Post GA (build 10.9.7954) or later.

THA-PSIRT guidance ↗

cve.new guidance unless attributed to a publisher. This page does not inspect your installation.

Public exploit evidence

No public exploit reference is identified in the imported evidence. This is not a claim that no exploit exists.

Original source description

Read the full publisher 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).

References

1 sources

supportportal.thalesgroup.com/csm

Vendor advisoryTHA-PSIRT

Inside the record

Evidence available

Package identity · not supplied

Version evidence

Remediation guidance

Weakness classification

Additional publishers

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-94395

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-1284 ↗

CWE-1284 Improper validation of specified quantity in input

THA-PSIRT

CWE-787 ↗

CWE-787 Out-of-bounds write

THA-PSIRT

CWE-121 ↗

CWE-121 Stack-based buffer overflow

THA-PSIRT

Environment requirements

These conditions apply together as specified by the publisher. A matching product name alone does not establish exposure.

THA-PSIRT · platform conditions

Any condition may hold

Vulnerable product

cpe:2.3:a:thalesgroup:safenet_authentication_client_sis_token_engine:*:*:windows:*:*:*:*:*

From (inclusive): 10.8_r7

After:

Through (inclusive): 10.9_r3_build_10.9.7449_

Before:

Applicability preview

[
  {
    "operator": "OR",
    "nodes": [
      {
        "operator": "OR",
        "negate": false,
        "cpeMatch": [
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:a:thalesgroup:safenet_authentication_client_sis_token_engine:*:*:windows:*:*:*:*:*",
            "versionStartIncluding": "10.8_r7",
            "versionEndIncluding": "10.9_r3_build_10.9.7449_"
          }
        ]
      }
    ]
  }
]

Contributing organizations · 2

THA-PSIRT

Assigning organization

2026-11-05

CISA-ADP

Additional data publisher

2026-11-05

Timeline

All times UTC

5 Nov 2026, 18:12
Advisory published
Publication date supplied by the source.
5 Nov 2026, 19:08
Source updated
Latest modification date supplied by the source.
5 Nov 2026, 19:50
Last imported by cve.new
Latest catalog import, not the date we first saw this advisory.

What changed

Follow changes

CVE · CVE-2026-943952026-11-05

Observed 2026-11-05T19:50:17.468Z · upstream updated 2026-11-05T19:08:41.066Z

Severity assessment changed

before

[
  {
    "source": "THA-PSIRT",
    "vector": "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",
    "score": 7
  }
]

after

[
  {
    "source": "THA-PSIRT",
    "vector": "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",
    "score": 7
  },
  {
    "source": "CISA-ADP",
    "vector": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
    "score": 6.8
  }
]

Prioritization updated

before

[]

after

[
  {
    "source": "CISA-ADP",
    "type": "SSVC",
    "role": "CISA Coordinator",
    "timestamp": "2026-11-05T19:08:37.663004Z",
    "decisions": [
      {
        "name": "Exploitation",
        "value": "none"
      },
      {
        "name": "Automatable",
        "value": "no"
      },
      {
        "name": "Technical Impact",
        "value": "total"
      }
    ]
  }
]

Large field values are marked as truncated previews. Original source snapshots remain retained.

Showing up to 50 most recent observed changes.

Reading the signals

Severity · CVSS: Technical impact and attack conditions. The headline is the highest imported catalog score; sources may disagree.
Observed exploitation · KEV: An absent or unavailable KEV listing does not establish that exploitation has not occurred.
Predicted exploitation · EPSS: No EPSS estimate available in this record.

CISA-ADP · SSVC

CISA Coordinator · 2026-11-05

Exploitation: none
Automatable: no
Technical Impact: total

SSVC describes the publisher’s decision context. Your organization’s exposure and priorities may differ.

Record identifiers

Aliases: None recorded

Source evidence

Request a correction or dispute

Start with the assigning organization for this record. Include the CVE ID, the disputed information, and supporting evidence. A dispute does not itself reject a record.

Find the responsible CNA →Official dispute and escalation process ↗

CVE CVE-2026-94395

Enrichment coverage

NVDNot fully checked

GHSANot fully checked

EUVDNot fully checked

EPSSNot fully checked

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

Severity and exploitation

What this means

Attack conditions

Affected versions

Safenet Authentication Client SIS token engine

affected

unaffected

unknown

What to do

Public exploit evidence

Original source description

References

Inside the record

Evidence available

Original records

Underlying weaknesses

Environment requirements

Timeline

Advisory published

Source updated

Last imported by cve.new

What changed