{"id":"CVE-2026-78402","state":"PUBLISHED","title":"Stack Buffer Overflow in Sentinel Keys Server","description":"Stack-based buffer overflow and out-of-bounds\nwrite vulnerability in Thales Sentinel Keys Server on Windows allows Overflow\nBuffers. \n\n\n\nSentinel Keys Server does not check the length of the first field in\nthe input message. A local attacker may craft an input and send it to Sentinel\nKeys Server. It may lead to code execution as NT AUTHORITY\\SYSTEM enabling\nlocal privilege escalation.\n\n\n\n\n\nThis issue affects Sentinel Keys Server: versions\nlower than 1.3.8.0.","publishedAt":"2026-10-30T19:11:53.889Z","updatedAt":"2026-10-30T20:00:42.731Z","severity":{"score":7.3,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","source":"THA-PSIRT"},"assigner":"THA-PSIRT","products":["Thalesgroup Sentinel Keys Server"],"affected":[{"vendor":"Thalesgroup","product":"Sentinel Keys Server","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.3.8.0","versionType":"custom"}],"platforms":["Windows"]}],"references":["https://supportportal.thalesgroup.com/csm?id=kb_article_view&sys_kb_id=50fc9f3b3b005f10bba8b41864e45a61&sysparm_article=KB0031216"],"weaknesses":["CWE-121","CWE-787"],"ingestedAt":"2026-10-30T20:14:06.645Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/78xxx/CVE-2026-78402.json","commit":"d7f5c3fe206091a44e450f13bfe51dc81b8a7843","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-78402","state":"PUBLISHED","datePublished":"2026-10-30T19:11:53.889Z","dateUpdated":"2026-10-30T20:00:42.731Z","assignerShortName":"THA-PSIRT","assignerOrgId":"9d5917ae-205d-4ae5-8749-1f49479b1395","dateReserved":"2026-08-24T14:22:03.585Z"},"containers":{"cna":{"title":"Stack Buffer Overflow in Sentinel Keys Server","descriptions":[{"lang":"en","value":"Stack-based buffer overflow and out-of-bounds\nwrite vulnerability in Thales Sentinel Keys Server on Windows allows Overflow\nBuffers. \n\n\n\nSentinel Keys Server does not check the length of the first field in\nthe input message. A local attacker may craft an input and send it to Sentinel\nKeys Server. It may lead to code execution as NT AUTHORITY\\SYSTEM enabling\nlocal privilege escalation.\n\n\n\n\n\nThis issue affects Sentinel Keys Server: versions\nlower than 1.3.8.0."}],"affected":[{"vendor":"Thalesgroup","product":"Sentinel Keys Server","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.3.8.0","versionType":"custom"}],"platforms":["Windows"]}],"references":[{"url":"https://supportportal.thalesgroup.com/csm?id=kb_article_view&sys_kb_id=50fc9f3b3b005f10bba8b41864e45a61&sysparm_article=KB0031216","tags":["vendor-advisory"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"LOCAL","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH","subIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"HIGH","baseScore":7.3,"vectorString":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}},{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseSeverity":"HIGH","baseScore":7.8,"vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-121","lang":"en","description":"CWE-121 Stack-based buffer overflow","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-787","lang":"en","description":"CWE-787 Out-of-bounds write","type":"CWE"}]}],"providerMetadata":{"shortName":"THA-PSIRT","orgId":"9d5917ae-205d-4ae5-8749-1f49479b1395","dateUpdated":"2026-10-30T19:47:48.568Z"},"impacts":[{"capecId":"CAPEC-100","descriptions":[{"lang":"en","value":"CAPEC-100 Overflow Buffers"}]}],"cpeApplicability":[{"operator":"OR","nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:thalesgroup:sentinel_keys_server:*:*:windows:*:*:*:*:*","versionStartIncluding":"0","versionEndExcluding":"1.3.8.0"}]}]}],"solutions":[{"lang":"en","value":"Upgrade latest version.","supportingMedia":[{"type":"text/html","base64":false,"value":"Upgrade latest version."}]}],"credits":[{"lang":"en","value":"Matt Hetelson (matthew.hetelson@revolutional.com)","type":"finder"}],"source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"Vulnogram 1.0.5"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-30T20:00:33.506955Z","id":"CVE-2026-78402","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-30T20:00:42.731Z"}}]}}}