CVE-2020-37029Public exploit

Local code execution via preference-file SEH overwrite

Published Jan 30, 2026 · Updated Jan 30, 2026

Classic buffer overflow in ksoft FTPDummy! 4.80 allows local users to execute arbitrary code through a crafted preference file. On startup, the application reads ftpdummypref3.dat without bounding its contents, allowing data after 477 bytes to overwrite the SEH chain. The file must be placed in the installation directory and the application launched; successful exploitation runs code in the application user context.

CVSS severity8.4
High
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Classic buffer overflow in ksoft FTPDummy! 4.80 allows local users to execute arbitrary code through a crafted preference file. On startup, the application reads ftpdummypref3.dat without bounding its contents, allowing data after 477 bytes to overwrite the SEH chain. The file must be placed in the installation directory and the application launched; successful exploitation runs code in the application user context.

The record

CVE
CVE-2020-37029
Published
Jan 30, 2026
Updated
Jan 30, 2026
Vendor
ksoft
Product
FTPDummy!
Classifications
CWE-120, T1203
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Jan 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 30, 2026Record 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=4.80

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

ksoft · FTPDummy!version=4.80

Published CVSS scores

8.4VulnCheckCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
8.4VulnCheckCVSS:3.1/AV:L/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.

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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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1203Exploitation for Client Execution

Public exploit references

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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