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CVE-2026-89040

Tencent Mass Service Engine in Cluster (MSEC) path traversal

CVSS 3.1 9.8 CRITICALCVSS 4.0 9.3 CRITICALCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-89040

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-89040

Published

Mass Service Engine in Cluster (MSEC)

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Tencent",
                    "product": "Mass Service Engine in Cluster (MSEC)",
                    "defaultStatus": "unknown",
                    "versions": [
                        {
                            "version": "0",
                            "status": "affected",
                            "lessThan": "*",
                            "versionType": "custom"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON