CVE-2021-27486

mediumpriority · track · 31EPSS 0.010 · 62 %ileEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.98% (62nd) EPSS

CVSS 6.8 · 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

FATEK Automation WinProladder Versions 3.30 and prior is vulnerable to an integer underflow, which may cause an out-of-bounds write and allow an attacker to execute arbitrary code.

remediations

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

No vendor fix yet; a mitigation is available.

MitigationWinProladdercisa_csaf_ot
FATEK Automation is aware of the issue and is currently developing a solution. For more information contact FATEK via email or phone: +886-2-2808-2192

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

v3.17.8highAV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

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-191USCWE-191USCWE-191US

affected products (5)

Products and version ranges known to be affected.

WinProladder: Versions 3.30 and priorall versionscisa_csaf_otUS
FATEK Automation WinProladder≤ 3.30cisa_csaf_otUS
n/a FATEK Automation WinProladder≤ WinProladder Versions 3.30 and priorenisa_euvdEU
FATEK Automation WinProladder≤ 3.30fstec_bduRU
fatek winproladder≤ 3.30nvdUScpe:2.3:a:fatek:winproladder:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

ICSA-21-098-01FATEK Automation WinProladder2021-04-08icsa · cisa_csaf_otUS
Successful exploitation of this vulnerability could cause execution of arbitrary code.

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 2021-04-12modified 2026-06-17

references (5)

External citations — patches, advisories, analysis.

https://nvd.nist.gov/vuln/detail/CVE-2021-27486 cnnvd
https://us-cert.cisa.gov/ics/advisories/icsa-21-098-01 cnnvd
https://www.fatek.com/enPatchcnnvd
https://us-cert.cisa.gov/ics/advisories/icsa-21-098-01 enisa_euvd
https://us-cert.cisa.gov/ics/advisories/icsa-21-098-01Third Party AdvisoryUS Government Resourcenvd

scry

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