ABB OPC Server for Incorrect Permission Assignment for Critical Resource (CVE-2021-22284)

high Tenable OT Security Plugin ID 500938


The remote OT asset is affected by a vulnerability.


Incorrect Permission Assignment for Critical Resource vulnerability in OPC Server for AC 800M allows an attacker to execute arbitrary code in the node running the AC800M OPC Server.

This plugin only works with Tenable.ot.
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Refer to the vendor advisory.

See Also

Plugin Details

Severity: High

ID: 500938

Version: 1.2

Type: remote

Family: Tenable.ot

Published: 3/29/2023

Updated: 9/20/2023

Risk Information


Risk Factor: Medium

Score: 5.9


Risk Factor: Medium

Base Score: 6.5

Temporal Score: 4.8

Vector: CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:P

CVSS Score Source: CVE-2021-22284


Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:abb:opc_server_for_ac_800m

Required KB Items: Tenable.ot/ABB

Exploit Ease: No known exploits are available

Patch Publication Date: 2/4/2022

Vulnerability Publication Date: 2/4/2022

Reference Information

CVE: CVE-2021-22284

CWE: 732