CVE-2021-32988

Code execution via out-of-bounds file write

Published Jun 29, 2021 · Updated Aug 3, 2024

Out-of-bounds write in FATEK Automation WinProladder 3.30 and earlier allows attackers to execute code through a crafted project file. The file-input parser writes beyond its allocated memory boundary while processing attacker-controlled data; no finer-grained locus is public. Execution requires a user to open the malicious file, after which attacker-supplied code runs on the affected workstation.

CVSS severity9.8
Critical
EPSS probability1.77%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in FATEK Automation WinProladder 3.30 and earlier allows attackers to execute code through a crafted project file. The file-input parser writes beyond its allocated memory boundary while processing attacker-controlled data; no finer-grained locus is public. Execution requires a user to open the malicious file, after which attacker-supplied code runs on the affected workstation.

The record

CVE
CVE-2021-32988
Published
Jun 29, 2021
Updated
Aug 3, 2024
Vendor
FATEK Automation Corporation
Product
WinProladder
Classifications
CWE-787, T1203, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 29, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=WinProladder: Versions 3.30 and prior

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

FATEK Automation Corporation · WinProladderversion=WinProladder: Versions 3.30 and prior

Published CVSS scores

7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 11, 2026Sep 17, 2026
Latest reporting daySep 17, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1203Exploitation for Client Execution
T1204.002Malicious File

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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