CVE-2021-32939

Code execution via unchecked FPJ buffer write

Published Aug 11, 2021 · Updated Aug 3, 2024

An out-of-bounds write in FATEK Automation FvDesigner 1.5.88 and earlier allows remote attackers to execute code via a crafted FPJ file. The FPJ parser fails to validate user-supplied data before writing it past the end of an allocated buffer. Exploitation requires the target to open the malicious file or visit a page that supplies it, and successful execution runs in the current process context.

CVSS severity7.8
High
EPSS probability1.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An out-of-bounds write in FATEK Automation FvDesigner 1.5.88 and earlier allows remote attackers to execute code via a crafted FPJ file. The FPJ parser fails to validate user-supplied data before writing it past the end of an allocated buffer. Exploitation requires the target to open the malicious file or visit a page that supplies it, and successful execution runs in the current process context.

The record

CVE
CVE-2021-32939
Published
Aug 11, 2021
Updated
Aug 3, 2024
Vendor
FATEK Automation Corporation
Product
FvDesigner
Classifications
CWE-787, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 11, 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=FvDesigner, Versions 1.5.88 and prior

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

FATEK Automation Corporation · FvDesignerversion=FvDesigner, Versions 1.5.88 and prior

Published CVSS scores

6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 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

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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