CVE-2026-89040
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Tencent | Mass Service Engine in Cluster (MSEC) | 0 < * | affected |
Weaknesses
- CWE-22: CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: total
References
- https://github.com/Tencent/MSEC
- https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-258-02.json
- https://www.cve.org/CVERecord?id=CVE-2026-89040
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