Buffer Overflow Vulnerability in Core FTP Lite by Core FTP
CVE-2020-37155

6.7MEDIUM

Key Information:

Vendor

Core Ftp

Status
Core Ftp Lite
Vendor
CVE Published:
6 February 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2020-37155?

Core FTP Lite 1.3 is susceptible to a buffer overflow vulnerability in the username input field. By supplying an oversized payload, such as a 7000-byte string of repeated 'A' characters, attackers can exploit this flaw to crash the application. This vulnerability does not require any additional interaction from the user, making it particularly concerning for operational stability.

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Deploy the Patch

Affected Version(s)

Core FTP Lite 1.3c Build 1437

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2020-37155 - Proof of Concept

References

https://www.exploit-db.com/exploits/48100
exploit
http://www.coreftp.com/
product
https://www.vulncheck.com/advisories/core-ftp-lite-denial...
third-party-advisory

CVSS V4

Score:
6.7
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Berat Isler
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