CVE-2020-8484

Controller data tampering via weak IPC access controls

Published Apr 29, 2020 · Updated Aug 4, 2024

Access-control weakness in ABB 800xA for DCI before 6.1.1 allows local users to read or write controller data or crash processes. Same-machine IPC objects use weak access-control settings, allowing a crafted local application to inject garbage or structured data into exchanges between Windows processes. Exploitation requires an authenticated account and code execution on a system node; injected data can corrupt runtime values, drive incorrect controller actions, or interrupt the node.

CVSS severity7.8
High
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

Access-control weakness in ABB 800xA for DCI before 6.1.1 allows local users to read or write controller data or crash processes. Same-machine IPC objects use weak access-control settings, allowing a crafted local application to inject garbage or structured data into exchanges between Windows processes. Exploitation requires an authenticated account and code execution on a system node; injected data can corrupt runtime values, drive incorrect controller actions, or interrupt the node.

The record

CVE
CVE-2020-8484
Published
Apr 29, 2020
Updated
Aug 4, 2024
Vendor
ABB
Product
ABB 800xA for DCI
Classifications
CWE-264, T0814, T0836
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 · ABB 800xA for DCIversion=all versions

Published CVSS scores

7.8ABBCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.6NIST NVDAV:L/AC:L/Au:N/C:P/I:P/A:P
7.6ABBCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:U/RC:C

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-264Permissions, Privileges, and Access Controls
T0814Denial of Service
T0836Modify Parameter

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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