No exploitation reported

CVE-2021-38426

No exploitation reported by the sources we read.

Published2021-10-18
WeaknessCWE-787

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

FATEK Automation WinProladder versions 3.30 and prior lacks proper validation of user-supplied data when parsing project files, which could result in an out-of-bounds write. An attacker could leverage this vulnerability to execute arbitrary code.

Timeline

dates in UTC

2021-10-1813:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-38426?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-38426?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Fatek winproladder

Branch	Affected	Fixed in	Source
3.30	≤ 3.30	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

ICSA-21-280-06 CISA1 known affected
FATEK Automation WinProladder
WinProladder: Versions 3.30 and prior

Full record on NVD

Fix

Mitigation from the vendor CISA ICSA-21-280-06 · 1 productDo not click web links or open unsolicited attachments in email messages.
Mitigation from the vendor CISA ICSA-21-280-06 · 1 productRefer to Recognizing and Avoiding Email Scams for more information on avoiding email scams.
Mitigation from the vendor CISA ICSA-21-280-06 · 1 productRefer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks.

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CNACVSS 3.17.8read 2026-10-23
NVDCVSS 3.17.8read 2026-10-23
NVDCVSS 2.06.8read 2026-10-23
CNAweakness (CWE)CWE-787read 2026-10-23
FIRST EPSSEPSS score1.0 %2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published: 2021-10-18
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2021-38426?

Is CVE-2021-38426 actively exploited?

Active exploitation of CVE-2021-38426 has not been confirmed. Its EPSS score was 1.0% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-38426?

CVE-2021-38426 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

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