CVE-2020-5807

mediumpriority · track · 44EPSS 0.393 · 99 %ileEUUS

grimoire priorityP1 · Urgent

Exploitable?

—

no known exploitation

Likely / severe?

39.3% (99th) EPSS

CVSS 5 · medium

Is it mine?

6 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cisa_csaf_ot · nvd

EPSS · scored 2026-10-27

An unauthenticated remote attacker can send data to RsvcHost.exe listening on TCP port 5241 to add entries in the FactoryTalk Diagnostics event log. The attacker can specify long fields in the log entry, which can cause an unhandled exception in wcscpy_s() if a local user opens FactoryTalk Diagnostics Viewer (FTDiagViewer.exe) to view the log entry. Observed in FactoryTalk Diagnostics 6.11. All versions of FactoryTalk Diagnostics are affected.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

No vendor fix yet; a mitigation is available.

MitigationFactoryTalk Linx softwarecisa_csaf_ot
Confirm the least-privilege user principle is followed and the user/service account access to shared resources (such as a database) is only granted with a minimum number of rights as needed.
MitigationFactoryTalkServices Platformcisa_csaf_ot
Confirm the least-privilege user principle is followed and the user/service account access to shared resources (such as a database) is only granted with a minimum number of rights as needed.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.07.5highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · CISA US

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Hsecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-755USprimaryCWE-755US

affected products (6)

Products and version ranges known to be affected.

FactoryTalk Linx software: Versions 6.20 and prior (CVE-2020-5806 only affects Versions 6.10 6.11 and 6.20)all versionscisa_csaf_otUS
FactoryTalkServices Platform: Versions 6.20 and prior (Only affected by CVE-2020-5807)all versionscisa_csaf_otUS
Rockwell Automation FactoryTalk Linx software≤ 6.20cisa_csaf_otUS
Rockwell Automation FactoryTalkServices Platform≤ 6.20cisa_csaf_otUS
n/a Rockwell FactoryTalk Diagnostics≤ All versions of FactoryTalk Diagnosticsenisa_euvdEU
rockwellautomation factorytalk diagnostics≤ 6.11nvdUScpe:2.3:a:rockwellautomation:factorytalk_diagnostics:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

ICSA-21-028-01Rockwell Automation FactoryTalk Linx and FactoryTalk Services Platform2021-01-28icsa · cisa_csaf_otUS
Successful exploitation of these vulnerabilities may result in denial-of-service conditions.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cisa_csaf_ot nvd NVD CVE.org MITRE

published 2020-12-29modified 2026-06-17

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+700 more

references (7)

External citations — patches, advisories, analysis.

scry

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