CVE-2020-5801

mediumpriority · track · 40EPSS 0.297 · 98 %ileEURUUS

grimoire priorityP1 · Urgent

Exploitable?

—

no known exploitation

Likely / severe?

29.7% (98th) EPSS

CVSS 5 · medium

Is it mine?

5 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cisa_csaf_ot

EPSS · scored 2026-10-27

An attacker can craft and send an OpenNamespace message to port 4241 with valid session-id that triggers an unhandled exception in CFTLDManager::HandleRequest function in RnaDaSvr.dll, resulting in process termination. Observed in FactoryTalk Linx 6.11. All versions of FactoryTalk Linx 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.

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

v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-755USprimaryCWE-755USCWE-755US

affected products (5)

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
Rockwell Automation FactoryTalk Linx software≤ 6.20cisa_csaf_otUS
n/a Rockwell FactoryTalk Linx≤ All versions of FactoryTalk Linxenisa_euvdEU
Rockwell Automation Inc. FactoryTalk Linx≤ 6.11fstec_bduRU
rockwellautomation factorytalk linx≤ 6.11nvdUScpe:2.3:a:rockwellautomation:factorytalk_linx:*:*:*:*:*:*:*:*

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 (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu 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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