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Fencer Intel
high 8.8

CVE-2020-8477 json

ABB System 800xA Information Manager Remote Code Execution

published 6y ago modified 4mo ago also EUVD-2020-29343

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.7%
EPSS 1.7% chance of exploitation in 30 days, percentile 77%
public exploits
0
none known

Summary

The installations for ABB System 800xA Information Manager versions 5.1, 6.0 to 6.0.3.2 and 6.1 wrongly contain an auxiliary component. An attacker is able to use this for an XSS-like attack to an authenticated local user, which might lead to execution of arbitrary code.

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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-20-184-02 updated cvss 8.8

ABB System 800xA Information Manager

  • ABB System 800xA Information Manager < 6.0.3.3 RU1, < 5.1 Rev E/5.1 FP4 Rev E TC6, < 6.1 RU1
    affected: mitigation “This vulnerability was corrected in System 800xA of the following versions: 6.0.3.3 RU1, ABB recommends users on the 6.0.3 LTS track to update 6.0.3.3 and install RU1 for IM.” 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

1.71% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Affected products

  • ABB System 800xA Information Manager

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation
  • CWE-489 Active Debug Code

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.