Advantech WebAccess webvrpcs.exe Path Traversal RCE

critical Nessus Plugin ID 117360
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.


The remote host is running a SCADA application that is affected by a path traversal vulnerability.


The Advantech WebAccess/SCADA Network Service (webvrpcs.exe) running on the remote host is affected by a path traversal vulnerability due to the failure to properly validate user-supplied input when processing a DCERPC request. An unauthenticated, remote attacker can exploit this, via a series of crafted requests, to execute arbitrary code.

Note that this vulnerability is supposedly fixed in WebAccess/SCADA version 8.3, but it appears that versions 8.3.1 and 8.3.2 are still vulnerable.


WebAccess/SCADA version 8.3.3 or later appears to fix the issue.
Contact vendor for confirmation.

See Also

Plugin Details

Severity: Critical

ID: 117360

File Name: scada_advantech_webaccess_cve-2017-16720.nbin

Version: 1.71

Type: remote

Family: SCADA

Published: 9/10/2018

Updated: 12/20/2021

Dependencies: scada_advantech_webaccess_webvrpcs_detect.nbin

Risk Information

CVSS Score Source: CVE-2017-16720


Risk Factor: Medium

Score: 6.7


Risk Factor: Critical

Base Score: 10

Temporal Score: 7.8

Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C

Temporal Vector: E:POC/RL:OF/RC:C


Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: E:P/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:advantech:webaccess

Exploit Available: true

Exploit Ease: Exploits are available

Exploited by Nessus: true

Vulnerability Publication Date: 1/4/2018

Reference Information

CVE: CVE-2017-16720

BID: 102424

ICSA: 18-004-02A

ZDI: ZDI-18-024

TRA: TRA-2018-23