Answer in brief
CVE-2026-89040 records a Unknown severity vulnerability in Tencent Mass Service Engine in Cluster (MSEC) path traversal. The current sources do not mark it as known exploited. The current feed maps Tencent/Mass Service Engine in Cluster (MSEC) (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Tencent/Mass Service Engine in Cluster (MSEC) (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Tencent/Mass Service Engine in Cluster (MSEC)generic | >=0 <* | * |
Published upstream
Sep 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 15, 2026
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.
Quoted source text, attributed separately from HOL analysis.