CVE-2020-8481

Host takeover via unprotected confidential-data file

Published Apr 29, 2020 · Updated Aug 4, 2024

Information disclosure in ABB Central Licensing System before 5.1.0-5 allows local users to read confidential data from an unprotected file. CLS writes confidential data without protecting the file from low-privileged reads; ABB has not identified the file or data publicly. A low-privileged login to an affected node is required, and the exposed data enables complete control of the computer.

CVSS severity9.8
Critical
EPSS probability1.85%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in ABB Central Licensing System before 5.1.0-5 allows local users to read confidential data from an unprotected file. CLS writes confidential data without protecting the file from low-privileged reads; ABB has not identified the file or data publicly. A low-privileged login to an affected node is required, and the exposed data enables complete control of the computer.

The record

CVE
CVE-2020-8481
Published
Apr 29, 2020
Updated
Aug 4, 2024
Vendor
GENEREX SYSTEMS Computervertriebsgesellschaft mbH
Product
Central Licensing System
Classifications
CWE-200, CWE-922, T1005
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 29, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.1 <5*

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

GENEREX SYSTEMS Computervertriebsgesellschaft mbH · Central Licensing Systemversion=5.1 <5*
GENEREX SYSTEMS Computervertriebsgesellschaft mbH · Manufacturing Operations Managementversion=1812; version=1909
GENEREX SYSTEMS Computervertriebsgesellschaft mbH · OPC Server for MOD 300 (non-800xA)version=1.4
GENEREX SYSTEMS Computervertriebsgesellschaft mbH · Composer Harmonyversion=5.1; version=6.0; version=6.1
GENEREX SYSTEMS Computervertriebsgesellschaft mbH · Composer Melodyversion=5.3; version=6 <=6.3
GENEREX SYSTEMS Computervertriebsgesellschaft mbH · Symphony Plus S+ Engineeringversion=1.1 <=2.2
GENEREX SYSTEMS Computervertriebsgesellschaft mbH · Compact HMIversion=5.1; version=6.0
GENEREX SYSTEMS Computervertriebsgesellschaft mbH · OPC Data Linkversion=2.1; version=2.2
GENEREX SYSTEMS Computervertriebsgesellschaft mbH · Advant OCS Control Builder Aversion=1.3; version=1.4
GENEREX SYSTEMS Computervertriebsgesellschaft mbH · Advant OCS AC 100 OPS Serverversion=5.1; version=6.0; version=6.1
GENEREX SYSTEMS Computervertriebsgesellschaft mbH · Control Builder Safeversion=1.0; version=1.1; version=2.0
GENEREX SYSTEMS Computervertriebsgesellschaft mbH · Composer CTKversion=6.1; version=6.2
GENEREX SYSTEMS Computervertriebsgesellschaft mbH · Harmony OPC Server Standaloneversion=6.0; version=6.1; version=7.0
GENEREX SYSTEMS Computervertriebsgesellschaft mbH · AdvaBuildversion=3.7 SP1; version=3.7 SP2
GENEREX SYSTEMS Computervertriebsgesellschaft mbH · Symphony Plus S+ Operationsversion=3 <=3.2
GENEREX SYSTEMS Computervertriebsgesellschaft mbH · System 800xAversion=5.1; version=6.0; version=6.1
GENEREX SYSTEMS Computervertriebsgesellschaft mbH · Knowledge Managerversion=8.0; version=9.0; version=9.1

Published CVSS scores

10.0National Vulnerability DatabaseAV:N/AC:L/Au:N/C:C/I:C/A:C
9.8Asea Brown Boveri Ltd. (ABB)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
CWE-922Insecure Storage of Sensitive Information
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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