CVE-2020-16234

mediumpriority · track · 31EPSS 0.013 · 70 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.30% (70th) EPSS

CVSS 6.8 · 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

In PLC WinProladder Version 3.28 and prior, a stack-based buffer overflow vulnerability can be exploited when a valid user opens a specially crafted file, which may allow an attacker to remotely execute arbitrary code.

remediations

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

No vendor fix yet; a mitigation is available.

MitigationPLC WinProladdercisa_csaf_ot
FATEK has not responded to requests to work with CISA to mitigate this vulnerability. Users of these affected products who would like to see more responsible security are invited to contact Fatek customer support.
https://www.fatek.com/en/download.php

cvss

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

7.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.8–7.8

v2.06.8mediumAV:N/AC:M/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 8.6 · impact 6.4

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 5.9

v3.07.8highCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · CISA US

v3.17.1highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-121USCWE-121US

affected products (4)

Products and version ranges known to be affected.

PLC WinProladder: Version 3.28 and priorall versionscisa_csaf_otUS
FATEK Automation PLC WinProladder≤ 3.28cisa_csaf_otUS
FATEK Automation PLC WinProladder≤ unspecified ≤3.28enisa_euvdEU
fatek winproladder≤ 3.28nvdUScpe:2.3:a:fatek:winproladder:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

ICSA-20-254-02FATEK Automation PLC WinProladder2020-09-10icsa · cisa_csaf_otUS
Successful exploitation of this vulnerability could crash the device being accessed; a buffer overflow condition may cause a denial-of-service event and remote code execution.

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 2020-09-30modified 2026-06-17

references (5)

External citations — patches, advisories, analysis.

http://www.nsfocus.net/vulndb/50631 cnnvd
https://nvd.nist.gov/vuln/detail/CVE-2020-16234 cnnvd
https://us-cert.cisa.gov/ics/advisories/icsa-20-254-02 cnnvd
https://us-cert.cisa.gov/ics/advisories/icsa-20-254-02 enisa_euvd
https://us-cert.cisa.gov/ics/advisories/icsa-20-254-02MitigationThird Party AdvisoryUS Government Resourcenvd

scry

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