CVE-2020-13573

mediumpriority · track · 31EPSS 0.041 · 91 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

4.14% (91st) EPSS

CVSS 5 · medium

Is it mine?

4 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cisa_csaf_ot · nvd

EPSS · scored 2026-10-27

A denial-of-service vulnerability exists in the Ethernet/IP server functionality of Rockwell Automation RSLinx Classic 2.57.00.14 CPR 9 SR 3. A specially crafted network request can lead to a denial of service. An attacker can send a sequence of malicious packets to trigger this vulnerability.

remediations

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

No vendor fix yet; a mitigation is available.

MitigationRSLinx Classiccisa_csaf_ot
Rockwell Automation recommends that customers using the affected software should upgrade to version 4.60.00 or later. Customers who are not able to upgrade to one of the corrected versions, should consider applying the available patch (BF31213) for their current version or applying the recommended security best practices.
https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1774.html

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 · ENISA EU

v3.07.5highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · talos-cna@cisco.com USexploitability 3.9 · impact 3.6

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · CISA US

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-119USprimaryCWE-125USCWE-823US

affected products (4)

Products and version ranges known to be affected.

Rockwell Automation RSLinx Classic: <=4.50.00all versionscisa_csaf_otUS
Rockwell Automation RSLinx Classic≤ 4.50.00cisa_csaf_otUS
n/a Rockwell Automation≤ Rockwell Automation RSLinx Classic 2.57.00.14 CPR 9 SR 3enisa_euvdEU
rockwellautomation rslinx= 2.57.00.14nvdUScpe:2.3:a:rockwellautomation:rslinx:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

ICSA-26-167-02RSLinx Classic Third-Party Vulnerability2026-06-16icsa · cisa_csaf_otUS
Successful exploitation of this vulnerability can lead to a denial of service, where the application will become unresponsive and will not recover on its own.

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 2021-01-07modified 2026-06-17

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+21038 more

references (5)

External citations — patches, advisories, analysis.

https://nvd.nist.gov/vuln/detail/CVE-2020-13573 cnnvd
https://talosintelligence.com/vulnerability_reports/TALOS-2020-1184 cnnvd
https://www.rockwellautomation.com/Patchcnnvd
https://talosintelligence.com/vulnerability_reports/TALOS-2020-1184 enisa_euvd
https://talosintelligence.com/vulnerability_reports/TALOS-2020-1184ExploitTechnical DescriptionThird Party Advisorynvd

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