CVE-2021-22683

Code execution via FPJ parser buffer overwrite

Published Mar 3, 2021 · Updated Aug 3, 2024

Out-of-bounds write in FATEK Automation Corporation FvDesigner 1.5.76 and earlier allows attackers to execute code via crafted FPJ files. The FPJ parser fails to validate user-supplied file data before writing beyond the end of an allocated buffer. Exploitation requires a user to open the malicious project file or visit a malicious page, after which code runs in the FvDesigner process context.

CVSS severity7.8
High
EPSS probability1.04%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in FATEK Automation Corporation FvDesigner 1.5.76 and earlier allows attackers to execute code via crafted FPJ files. The FPJ parser fails to validate user-supplied file data before writing beyond the end of an allocated buffer. Exploitation requires a user to open the malicious project file or visit a malicious page, after which code runs in the FvDesigner process context.

The record

CVE
CVE-2021-22683
Published
Mar 3, 2021
Updated
Aug 3, 2024
Vendor
FATEK Automation Corporation
Product
FvDesigner
Classifications
CWE-787, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 3, 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=Version 1.5.76 and prior

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

FATEK Automation Corporation · FvDesignerversion=Version 1.5.76 and prior

Published CVSS scores

6.8NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
7.8NVDCVSS: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
T1204.002User Execution: Malicious File

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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