No exploitation reported

CVE-2020-8475

No exploitation reported by the sources we read.

Published2020-04-29
WeaknessCWE-20

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

For the Central Licensing Server component used in ABB products ABB Ability™ System 800xA and related system extensions versions 5.1, 6.0 and 6.1, Compact HMI versions 5.1 and 6.0, Control Builder Safe 1.0, 1.1 and 2.0, Symphony Plus -S+ Operations 3.0 to 3.2 Symphony Plus -S+ Engineering 1.1 to 2.2, Composer Harmony 5.1, 6.0 and 6.1, Melody Composer 5.3, 6.1/6.2 and SPE for Melody 1.0SPx (Composer 6.3), Harmony OPC Server (HAOPC) Standalone 6.0, 6.1 and 7.0, ABB Ability™ System 800xA/ Advant® OCS Control Builder A 1.3 and 1.4, Advant® OCS AC100 OPC Server 5.1, 6.0 and 6.1, Composer CTK 6.1 and 6.2, AdvaBuild 3.7 SP1 and SP2, OPCServer for MOD 300 (non-800xA) 1.4, OPC Data Link 2.1 and 2.2, Knowledge Manager 8.0, 9.0 and 9.1, Manufacturing Operations Management 1812 and 1909, ABB AbilityTM SCADAvantage versions 5.1 to 5.6.5, a weakness in validation of input exists that allows an attacker to block license handling by sending specially crafted messages to the CLS web service.

Timeline

dates in UTC

2020-04-2902:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-8475?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-8475?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Abb 800xa system

Branch	Affected	Fixed in	Source
5.1	= 5.1	no fix published	NVD
6.0	= 6.0	no fix published	NVD
6.0	= 6.0.1	no fix published	NVD
6.0	= 6.0.3	no fix published	NVD
6.0	= 6.0.3.3	no fix published	NVD
6.1	= 6.1	no fix published	NVD

Abb compact hmi

Branch	Affected	Fixed in	Source
5.1	= 5.1	no fix published	NVD
6.0	= 6.0.1-1	no fix published	NVD
6.0	= 6.0.3-2	no fix published	NVD

Abb control builder safe

Branch	Affected	Fixed in	Source
1.0	= 1.0	no fix published	NVD
1.1	= 1.1	no fix published	NVD
2.0	= 2.0	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

ICSA-20-154-04 CISA16 known affected
ABB Central Licensing System
AdvaBuild: Versions 3.7 SP1 3.7 SP2 · ABB Ability System 800xA / Advant OCS Control Builder A: Versions 1.3 1.4 · ABB Ability System 800xA and related system extensions: Versions 5.1 6.0 6.1 · +13 more

Full record on NVD

Fix

Mitigation from the vendor CISA ICSA-20-154-04 · 16 productsUpgrade ABB CLS to the following version: 5.1 Rev A (5.1.0.38)
Mitigation from the vendor CISA ICSA-20-154-04 · 16 productsUpgrade ABB CLS to the following version: 5.1 Rev E (5.1.0.99)
Mitigation from the vendor CISA ICSA-20-154-04 · 16 productsUpgrade ABB CLS to the following version: 6.0 (6.0.0.26)
Mitigation from the vendor CISA ICSA-20-154-04 · 16 productsUpgrade ABB CLS to the following version: 6.0.3.3 (6.0.03000.192)
Mitigation from the vendor CISA ICSA-20-154-04 · 16 productsUpgrade ABB CLS to the following version: 6.1 RU1 (6.1.00100.417)
Mitigation from the vendor CISA ICSA-20-154-04 · 16 productsIf ABB Central Licensing Server 5.1 (5.1.0.14) or earlier has been used on the currently used hardware, please contact ABB for further assistance.

Advisories and patches

search.abb.comVendor Advisory
search.abb.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CNACVSS 3.15.3read 2026-10-23
NVDCVSS 3.17.5read 2026-10-23
NVDCVSS 2.02.1read 2026-10-23
CNAweakness (CWE)CWE-20read 2026-10-23
NVDweakness (CWE)CWE-20read 2026-10-23
FIRST EPSSEPSS score1.2 %2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2020-04-29
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2020-8475?

Is CVE-2020-8475 actively exploited?

Active exploitation of CVE-2020-8475 has not been confirmed. Its EPSS score was 1.2% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-8475?

CVE-2020-8475 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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