Vulnerability · CVE-2020-37155
Core FTP Lite 1.3 contains a buffer overflow vulnerability in the username input field that allows attackers to crash the application by supplying oversized input.
Published Feb 6, 2026 · catalog updated Oct 1, 2026 · Core FTP Core FTP Lite
Last checked Nov 5, 2026. A connected source was read within the last 7 days.
Check if you run it
No confirmed exploitation is on record for CVE-2020-37155. EPSS is 0.43%. Act only if a listed version of Core FTP Core FTP Lite is installed.
Gaps on this record
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
- Severity
- Medium6.7
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.43%
- Remediation
- Vendor / distro source
- Affected products
- vendor Core FTP Core FTP Lite 1.3c Build 1437
Core FTP Lite 1.3 contains a buffer overflow vulnerability in the username input field that allows attackers to crash the application by supplying oversized input. Attackers can generate a 7000-byte payload of repeated 'A' characters to trigger an application crash without requiring additional interaction.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- vendor Core FTP Core FTP Lite 1.3c Build 14371.3c Build 1437
How to fix CVE-2020-37155
No stored fix
No vendor fix text is stored. Use the linked advisory before you change production.
Version check
Seen in 1.3c Build 1437
Advisory
Open the cve_org record and follow its fix.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2020-37155. EPSS is 0.43%. Act only if a listed version of Core FTP Core FTP Lite is installed.
Which versions are affected?
Compare what you have installed with Core FTP Core FTP Lite 1.3c Build 1437 1.3c Build 1437. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
No weakness class is stored. EPSS 0.43%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Feb 6, 2026 · EUVD
Detected
Core FTP Lite 1.3 contains a buffer overflow vulnerability in the username input field that allows attackers to crash the application by supplying oversized input. Attackers can generate a 7000-byte payload of repeated 'A' characters to trigger an application crash without requiring additional interaction.
Oct 1, 2026 · EUVD
Updated
Core FTP Lite 1.3 contains a buffer overflow vulnerability in the username input field that allows attackers to crash the application by supplying oversized input. Attackers can generate a 7000-byte payload of repeated 'A' characters to trigger an application crash without requiring additional interaction.
Sources
- CVE.orgVulnerability recordCVE-2020-37155
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2020-37155
30-day exploitation probability 0.43%
first.org - EUVDVulnerability recordEUVD-2020-31108
Core FTP Lite 1.3 contains a buffer overflow vulnerability in the username input field that allows attackers to crash the application by supplying oversized input. Attackers can generate a 7000-byte payload of repeated 'A' characters to trigger an application crash without requir
euvd.enisa.europa.eu
References
Freshness
Last verified in this catalog Nov 5, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.
- FIRST EPSSNov 5, 2026
- CVE.orgNov 4, 2026
- EUVDNov 2, 2026