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Fencer Intel
high 7.8

CVE-2020-8474 json

ABB System 800xA Weak Registry Permissions

published 6y ago modified 4mo ago also EUVD-2020-29340

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 22%
public exploits
0
none known

Summary

Weak Registry permissions in ABB System 800xA Base allow low privileged users to read and modify registry settings related to control system functionality, allowing an authenticated attacker to cause system functions to stop or malfunction.

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Vendor advisories

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

cisa ICSA-20-154-02 updated cvss 7.8

ABB System 800xA Base

  • ABB System 800xA Base <= 6.0
    affected: vendor fix, mitigation “ABB recommends changing any user account passwords suspected to be known by an unauthorized person. Interactive logon (both local and remote) is recommended to be disabled 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

0.30% chance of exploitation in the next 30 days, higher than 22% of all scored CVEs (FIRST EPSS, 2026-11-09).

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 System 800xA Base

Classification

Weakness

References

Sources

Fencer Intel 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.