CVE-2020-5752

HIGH

Druva inSync inSyncCPHwnet64.exe RPC Type 5 Privilege Escalation

Title source: metasploit
STIX 2.1

Exploitation Summary

EIP tracks 5 public exploits for CVE-2020-5752. PoCs published by Matteo Malvica, 1F98D, yevh, including Metasploit module exploits/windows/local/druva_insync_insynccphwnet64_rcp_type_5_priv_esc.

AI-analyzed exploit summary This exploit leverages a path traversal vulnerability in Druva inSync Windows Client 6.6.3 to achieve local privilege escalation. It bypasses path validation via directory traversal sequences and executes arbitrary commands as NT AUTHORITY\SYSTEM via the inSyncCPHwnet64 RPC service.

Description

Relative path traversal in Druva inSync Windows Client 6.6.3 allows a local, unauthenticated attacker to execute arbitrary operating system commands with SYSTEM privileges.

Exploits (5)

exploitdb WORKING POC VERIFIED
by Matteo Malvica · textlocalwindows
https://www.exploit-db.com/exploits/48505

This exploit leverages a path traversal vulnerability in Druva inSync Windows Client 6.6.3 to achieve local privilege escalation. It bypasses path validation via directory traversal sequences and executes arbitrary commands as NT AUTHORITY\SYSTEM via the inSyncCPHwnet64 RPC service.

Classification
Working Poc 100%
Attack Type
Lpe
Complexity
Trivial
Reliability
Reliable
Target: Druva inSync Windows Client 6.6.3
No auth needed
Prerequisites: Local access to the target system · Druva inSync Windows Client 6.6.3 installed
devstral-2 · analyzed Feb 16, 2026 Full analysis →
exploitdb WORKING POC
by 1F98D · powershelllocalwindows
https://www.exploit-db.com/exploits/49211

This PowerShell script exploits a local privilege escalation vulnerability in Druva inSync Windows Client 6.6.3 by sending a crafted RPC request to inject a command that adds a new user. The exploit leverages a path traversal technique to execute arbitrary commands via the inSync service.

Classification
Working Poc 95%
Attack Type
Lpe
Complexity
Trivial
Reliability
Reliable
Target: Druva inSync Windows Client 6.6.3
No auth needed
Prerequisites: Druva inSync Windows Client 6.6.3 installed · Local access to the target system
devstral-2 · analyzed Feb 16, 2026 Full analysis →
nomisec WORKING POC 4 stars
by yevh · poc
https://github.com/yevh/CVE-2020-5752-Druva-inSync-Windows-Client-6.6.3---Local-Privilege-Escalation-PowerShell-

This PowerShell script exploits a local privilege escalation vulnerability in Druva inSync Windows Client 6.6.3 by leveraging a command injection flaw in an exposed RPC service. It sends a crafted RPC request to execute a reverse shell payload with elevated privileges.

Classification
Working Poc 95%
Attack Type
Lpe
Complexity
Moderate
Reliability
Reliable
Target: Druva inSync Windows Client 6.6.3
No auth needed
Prerequisites: Druva inSync Windows Client 6.6.3 installed · Local access to the target system
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec WORKING POC
by x0rbeexd · poc
https://github.com/x0rbeexd/CVE-2020-5752

This repository contains a functional C-based exploit for CVE-2020-5752, targeting the Druva inSync Windows Client (v6.6.3 and below). The exploit leverages an RPC service on port 6064 vulnerable to command injection via path traversal, allowing local privilege escalation to NT AUTHORITY\SYSTEM.

Classification
Working Poc 95%
Attack Type
Lpe
Complexity
Moderate
Reliability
Reliable
Target: Druva inSync Windows Client (v6.6.3 and below)
No auth needed
Prerequisites: Local access to the target machine · Druva inSync Windows Client (v6.6.3 or below) installed · Network connectivity to an attacker-controlled machine for reverse shell
devstral-2 · analyzed Feb 19, 2026 Full analysis →
metasploit WORKING POC EXCELLENT
by Chris Lyne, Matteo Malvica, bcoles · rubypoc
https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/local/druva_insync_insynccphwnet64_rcp_type_5_priv_esc.rb

This Metasploit module exploits a privilege escalation vulnerability in Druva inSync (CVE-2020-5752) by sending a maliciously crafted RPC type 5 message to the inSyncCPHwnet64.exe service on TCP port 6064, allowing arbitrary command execution as SYSTEM.

Classification
Working Poc 100%
Attack Type
Lpe
Complexity
Moderate
Reliability
Reliable
Target: Druva inSync versions 6.6.3 and prior
No auth needed
Prerequisites: Access to a vulnerable Druva inSync installation · Network access to TCP port 6064 on the target
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Exploit, Release Notes, Third Party Advisory x_refsource_misc
https://www.tenable.com/security/research/tra-2020-34

Scores

CVSS v3 7.8
EPSS 0.0861
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-22
Status published
Products (1)
druva/insync_client 6.6.3
Published May 21, 2020
Tracked Since Feb 18, 2026