CVE-2019-3999

HIGH

Druva inSync Windows Client 6.5.0 - Unauthenticated OS Command Injection

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2019-3999. PoCs published by Chris Lyne.

AI-analyzed exploit summary This exploit leverages a command injection vulnerability in the Druva inSync Windows Client 6.5.2 RPC service (port 6064) to execute arbitrary commands as NT AUTHORITY\SYSTEM, achieving local privilege escalation. The PoC constructs a malformed RPC request with a wide-character encoded command payload.

Description

Improper neutralization of special elements used in an OS command in Druva inSync Windows Client 6.5.0 allows a local, unauthenticated attacker to execute arbitrary operating system commands with SYSTEM privileges.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Chris Lyne · textlocalwindows
https://www.exploit-db.com/exploits/48400

This exploit leverages a command injection vulnerability in the Druva inSync Windows Client 6.5.2 RPC service (port 6064) to execute arbitrary commands as NT AUTHORITY\SYSTEM, achieving local privilege escalation. The PoC constructs a malformed RPC request with a wide-character encoded command payload.

Classification
Working Poc 95%
Attack Type
Lpe
Complexity
Trivial
Reliability
Reliable
Target: Druva inSync Windows Client 6.5.2
No auth needed
Prerequisites: Local access to the target system · Druva inSync Windows Client 6.5.2 installed and running
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Exploit, Third Party Advisory x_refsource_misc
https://www.tenable.com/security/research/tra-2020-12

Scores

CVSS v3 7.8
EPSS 0.0857
EPSS Percentile 94.4%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-78
Status published
Products (1)
druva/insync_client 6.5.0
Published Feb 25, 2020
Tracked Since Feb 18, 2026