{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-89040","assignerOrgId":"9119a7d8-5eab-497f-8521-727c672e3725","state":"PUBLISHED","assignerShortName":"cisa-cg","dateReserved":"2026-09-10T16:43:38.518Z","datePublished":"2026-09-15T20:05:07.497Z","dateUpdated":"2026-09-22T16:22:37.341Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"Tencent Mass Service Engine in Cluster (MSEC) allows a remote, unauthenticated attacker to send a crafted POST request including ../ and gain root access on the target device. An attacker who uploads a webshell can execute arbitrary code as root."}],"affected":[{"vendor":"Tencent","product":"Mass Service Engine in Cluster (MSEC)","defaultStatus":"unknown","versions":[{"version":"0","status":"affected","lessThan":"*","versionType":"custom"}]}],"tags":["unsupported-when-assigned"],"problemTypes":[{"descriptions":[{"description":"CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","lang":"en","type":"CWE","cweId":"CWE-22"}]}],"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":9.8,"attackVector":"NETWORK","baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}},{"cvssV4_0":{"version":"4.0","baseScore":9.3,"attackVector":"NETWORK","baseSeverity":"CRITICAL","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","userInteraction":"NONE","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","subIntegrityImpact":"NONE","vulnIntegrityImpact":"HIGH","subAvailabilityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","vulnConfidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-08-25T15:35:51.155854Z","id":"CVE-2026-89040","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"Tencent Mass Service Engine in Cluster (MSEC) path traversal","references":[{"name":"url","url":"https://github.com/Tencent/MSEC","tags":["product"]},{"name":"url","url":"https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-258-02.json","tags":["third-party-advisory"]},{"name":"url","url":"https://www.cve.org/CVERecord?id=CVE-2026-89040","tags":["vdb-entry"]}],"credits":[{"value":"Renatto Cecot Sommerer","lang":"en"}],"datePublic":"2026-09-15T00:00:00.000Z","providerMetadata":{"orgId":"9119a7d8-5eab-497f-8521-727c672e3725","shortName":"cisa-cg","dateUpdated":"2026-09-15T20:05:07.497Z"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-22T16:22:29.446485Z","id":"CVE-2026-89040","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-22T16:22:37.341Z"}}]}}