CVE-2026-78402 Thales Sentinel Keys Server - Buffer Overflow

Thales Sentinel Keys Server < 1.3.8.0 contains a stack-based buffer overflow and out-of-bounds write caused by unchecked length of the first field in input messages, letting local attackers execute code as NT AUTHORITY\SYSTEM, exploit requires local access.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.15% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Buffer Overflow
Impact
Remote Code Execution, Privilege Escalation
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
30 October 2026
Updated
1 November 2026
Weakness
CWE-121

Vendor fix

Update to version 1.3.8.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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