CVE-2018-6892: CloudMe Sync unauthenticated remote buffer overflow on port 8888

Automated analysis

Generated by VULONE's analysis model from the NVD record, CISA KEV and EPSS data on 18 September 2026. Confidence: high.

critical priorityCVSS 9.8 with no authentication or user interaction required, a network-reachable listener, and public exploit code make this trivially exploitable where the service is exposed.

What it is

CloudMe Sync before 1.11.0 contains a buffer overflow (CWE-119) reachable by an unauthenticated remote attacker who can connect to the client application's listening service on port 8888. A crafted payload overflows the buffer, letting the attacker control the program's execution flow and run arbitrary code. Because the service is network-exposed and needs no credentials, any reachable host running the affected client is at risk.

Impact

An attacker gains arbitrary code execution in the context of the CloudMe Sync process, which typically runs with the logged-in user's privileges. That allows full compromise of the host, including data theft, persistence and lateral movement.

Attack surface

Reached over the network by connecting directly to TCP port 8888 on a host running CloudMe Sync; the CVSS vector (AV:N/PR:N/UI:N) and the description confirm no authentication and no user interaction are required.

Exploitation

Multiple public exploit references exist, including Exploit-DB entries and Packet Storm postings, and EPSS is very high (0.93392, 99.8th percentile), though the CVE is not listed in CISA KEV.

What to do

• Upgrade CloudMe Sync to 1.11.0 or later, which the advisory states fixes the flaw.
• If upgrade is not immediately possible, block inbound TCP port 8888 at host and network firewalls so the service is not reachable from untrusted networks.
• Restrict the CloudMe Sync listener to localhost or a trusted management segment rather than exposing it broadly.
• Remove or disable the CloudMe Sync client on hosts that do not require it.
• Monitor vendor advisories for further updates, since later public exploits target 1.11.2.

Detection

• Alert on inbound connections to TCP port 8888 from external or unexpected source addresses.
• Monitor for crashes or abnormal termination of the CloudMe Sync process, which can indicate a failed overflow attempt.
• Hunt for suspicious child processes or command execution spawned by the CloudMe Sync process.
• Review network flow logs for repeated or oversized payloads directed at port 8888.

This assessment is produced automatically and is not human-reviewed. Verify against the vendor advisory before acting on it.