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Fencer Vulns
high 7.8

CVE-2020-8484 json

ABB System 800xA Inter process communication vulnerability - 800xA for DCI

published 2020-04-29 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-29350

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 27%
public exploits
0
none known

Summary

Insufficient protection of the inter-process communication functions in ABB System 800xA for DCI (all published versions) enables an attacker authenticated on the local system to inject data, allowing reads and writes to the controllers or cause windows processes to crash.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-20-154-03 updated cvss 7.8

ABB Multiple System 800xA Products

  • ABB 800xA Batch Management ABB 800xA for DCI ABB 800xA for MOD 300 ABB 800xA Information Management ABB 800xA RNRP ABB System 800xA Base
    +3 more products
    ABB Base Software for SoftControl ABB MMS Server for AC 800M ABB OPC Server for AC 800M
    affected: mitigation “ABB recommends changing any user account passwords suspected to be known by an unauthorized person. ABB recommends users disable interactive logon (both local and remote) for the service account.” search.abb.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

0.34% chance of exploitation in the next 30 days, higher than 27% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 4.6 AV:L/AC:L/Au:N/C:P/I:P/A:P

Affected products

  • ABB 800xA for DCI

Classification

Weakness
  • CWE-264 Permissions, Privileges, and Access Controls

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.