CVE-2018-14821

mediumpriority · track · 32EPSS 0.045 · 91 %ileEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

4.50% (91st) 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

Rockwell Automation RSLinx Classic Versions 4.00.01 and prior. This vulnerability may allow a remote, unauthenticated threat actor to intentionally send a malformed CIP packet to Port 44818, causing the RSLinx Classic application to terminate. The user will need to manually restart the software to regain functionality.

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 has released a new version of the software that can found at Rockwell Automation knowledgebase article KB 1075712
https://rockwellautomation.custhelp.com/app/answers/detail/a_id/1075712

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

v3.07.5highCVSS:3.0/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

v3.06.9mediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

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

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-119USprimaryCWE-119USCWE-122USCWE-122US

affected products (5)

Products and version ranges known to be affected.

RSLinx Classic: Versions 4.00.01 and priorall versionscisa_csaf_otUS
Rockwell Automation RSLinx Classic≤ 4.00.01cisa_csaf_otUS
Rockwell Automation RSLinx Classic≤ 4.00.01 and priorenisa_euvdEU
Rockwell Automation Inc. RSLinx Classic≤ 4.00.01fstec_bduRU
rockwellautomation rslinx≤ 4.00.01nvdUScpe:2.3:a:rockwellautomation:rslinx:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

ICSA-18-263-02Rockwell Automation RSLinx Classic2018-09-20icsa · cisa_csaf_otUS
Successful exploitation of these vulnerabilities could crash the device being accessed or allow arbitrary code execution on the device.

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 2018-09-20modified 2026-06-17

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Related entries.

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+21023 more

references (7)

External citations — patches, advisories, analysis.

https://ics-cert.us-cert.gov/advisories/ICSA-18-263-02 cnnvd
https://www.rockwellautomation.comPatchcnnvd
https://www.tenable.com/security/research/tra-2018-26 cnnvd
https://ics-cert.us-cert.gov/advisories/ICSA-18-263-02 enisa_euvd
https://www.tenable.com/security/research/tra-2018-26 enisa_euvd
https://ics-cert.us-cert.gov/advisories/ICSA-18-263-02Third Party AdvisoryUS Government Resourcenvd
https://www.tenable.com/security/research/tra-2018-26ExploitThird Party Advisorynvd

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