CVE-2020-8478

Runtime-data tampering via weak IPC object access controls

Published Apr 29, 2020 · Updated Aug 4, 2024

IPC access-control weakness in ABB OPC Server and MMS Server for AC 800M and Base Software before 6.1.1 allows local users to alter runtime data. Weak access-control settings on same-machine objects used by System 800xA processes permit a crafted local application to inject garbage or specially crafted IPC data. An authenticated user must log on to a system node and execute that application; injected data can falsify Control Builder's online runtime view, and affected processes can crash or lose communication.

CVSS severity5.3
Medium
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

IPC access-control weakness in ABB OPC Server and MMS Server for AC 800M and Base Software before 6.1.1 allows local users to alter runtime data. Weak access-control settings on same-machine objects used by System 800xA processes permit a crafted local application to inject garbage or specially crafted IPC data. An authenticated user must log on to a system node and execute that application; injected data can falsify Control Builder's online runtime view, and affected processes can crash or lose communication.

The record

CVE
CVE-2020-8478
Published
Apr 29, 2020
Updated
Aug 4, 2024
Vendor
ABB
Product
OPC Server for AC 800M
Classifications
CWE-74, CWE-264, T1565.002
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 29, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=all versions

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

ABB · OPC Server for AC 800Mversion=all versions
ABB · Base Software for SoftControlversion=all versions
ABB · MMS Server for AC 800Mversion=all versions

Published CVSS scores

2.1NIST NVDAV:L/AC:L/Au:N/C:N/I:P/A:N
5.2ABBCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:F/RL:U/RC:C
5.3ABBCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
3.3NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
CWE-264Permissions, Privileges, and Access Controls
T1565.002Data Manipulation: Transmitted Data Manipulation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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