Read the docs
TI-2026-83333 Aliases CVE-2026-78402GHSA-58x3-qrxv-fm7v

Stack buffer overflow in Thales Sentinel Keys Server

Priority LOW 31CWE-121Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.

Summary

Thales Sentinel Keys Server on Windows before 1.3.8.0 contains a stack-based buffer overflow (CWE-121). The server does not check the length of the first field in an input message, which lets data overwrite memory past a stack buffer. A local attacker with low privileges can send a crafted input to the server and run code as NT AUTHORITY\SYSTEM, which gives local privilege escalation.

Written with Claude Haiku 5.5 from the sources below · 2026-10-31

Description from the CNA

Stack-based buffer overflow and out-of-bounds write vulnerability in Thales Sentinel Keys Server on Windows allows Overflow Buffers.  Sentinel Keys Server does not check the length of the first field in the input message. A local attacker may craft an input and send it to Sentinel Keys Server. It may lead to code execution as NT AUTHORITY\SYSTEM enabling local privilege escalation. This issue affects Sentinel Keys Server: versions lower than 1.3.8.0.

Why it matters now

EPSS 0.00147 3rd percentileScored 2026-11-07
Fix Fixed Sentinel Keys Server (Thalesgroup): 1.3.8.0

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
ThalesSentinel Keys Serverbefore 1.3.8.01.3.8.0Patch availableCNA
  • Sentinel Keys Server VendorThales Affected before 1.3.8.0 Fixed in 1.3.8.0 Patch available CNA

Remediation

Update Sentinel Keys Server to version 1.3.8.0, the fixed version.

Written with Claude Haiku 5.5 from the sources below · 2026-10-31

  • Fix · CNA Sentinel Keys Server (Thalesgroup) Fixed in 1.3.8.0

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    Thalesgroup Sentinel Keys Server — supportportal.thalesgroup.com/csm?id=kb_article_view&sys_kb…

    2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-83334 Unauthenticated Stack Buffer Overflow in Sentinel Keys ServerPriority MEDIUM 41
    Show all 2 records → Advisory →

Timeline

  1. 2026-10-30 Threatist record created from CVE-2026-78402
  2. 2026-10-30 Alias added: GHSA-58x3-qrxv-fm7v
  3. 2026-11-01 Priority changed: MEDIUM → LOW

References

Advisory 1

  • TI-2021-12537 The Sentinel LDK Run-Time Environment installer (Versions 7.6 and prior) adds a firewall… CVSS 3.1CRITICAL 9.8
  • TI-2026-15119 SConnect: Native Host Unauthenticated Remote Code Execution Vulnerability CVSS 4.0CRITICAL 9.4
  • TI-2026-83334 Unauthenticated Stack Buffer Overflow in Sentinel Keys Server CVSS 4.0CRITICAL 9.3
  • TI-2026-05969 Vulnerability on Cryptobox external sharing feature CVSS 4.0MEDIUM 6.9
  • TI-2024-00179 Privilege Escalation in Thales SafeNet Sentinel HASP LDK CVSS 3.1HIGH 7.8
  • TI-2023-06413 Privilege Escalation in SafeNet Authentication Client CVSS 3.1HIGH 7.8
See all 24 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences