# CVE-2020-37208: Nsasoft SpotFTP buffer overflow in registration key field

Source: https://junglewise.ai/threats/cve-2020-37208-nsasoft-spotftp-buffer-overflow-in-registration-key-field  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-02-11. Updated: 2026-06-29  
License: CC BY 4.0 with a link back

CVE-2020-37208 · Severity: high · CVSS 7.5 · Published 2026-02-11

SpotFTP, a tool used for recovering FTP passwords, contains a flaw in its registration system. An attacker can cause the application to crash and become unusable by entering an excessively long registration key. This results in a denial of service, preventing legitimate users from accessing the software's features.

Technologies: [Nsasoft Spotftp](https://junglewise.ai/threats/technologies/spotftp). Vendors: [Nsasoft](https://junglewise.ai/threats/vendors/nsasoft).

## Quick answers

**Is CVE-2020-37208 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2020-37208 being exploited in the wild.

**How severe is CVE-2020-37208?** High severity, with a CVSS score of 7.5, published 11 February 2026.

**Which products and versions are affected?** Nsasoft SpotFTP FTP Password Recovery 3.0.0.0.

**Is there a fix for CVE-2020-37208?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2020-37208 attacked?** It is attacked with local access, in a network appliance.

**Am I affected by CVE-2020-37208?** Check whether you run Nsasoft Spotftp or Nsasoft SpotFTP FTP Password Recovery at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A buffer overflow vulnerability exists in SpotFTP version 3.0.0.0 within the registration key input field. The flaw is classified as an out-of-bounds write (CWE-787) triggered when the application fails to properly validate the length of the input provided in the 'Key' field. An attacker can exploit this by pasting a payload of approximately 1,000 characters into the registration dialog, leading to memory corruption and an application crash (Denial of Service). While some sources suggest a network vector, the primary exploit method requires local interaction with the application's GUI. A public Proof of Concept (PoC) is available.

## Affected products

- Nsasoft (Nsauditor) SpotFTP FTP Password Recovery 3.0.0.0

## Timeline

- 2020-01-06: disclosed: Initial PoC published on Exploit-DB
- 2026-02-11: advisory: NVD/VulnCheck advisory published

## References

- [http://www.nsauditor.com/](http://www.nsauditor.com/)
- [https://www.exploit-db.com/exploits/47849](https://www.exploit-db.com/exploits/47849)
- [https://www.vulncheck.com/advisories/spotftp-ftp-password-recovery-key-denial-of-service](https://www.vulncheck.com/advisories/spotftp-ftp-password-recovery-key-denial-of-service)

## Related threats

- [Nsasoft SpotFTP Password Recover denial of service in Name field](https://junglewise.ai/threats/cve-2019-25711-nsasoft-spotftp-password-recover-denial-of-service-in-name-field)
- [Nsasoft SpotFTP buffer overflow in registration name field](https://junglewise.ai/threats/cve-2020-37209-nsasoft-spotftp-buffer-overflow-in-registration-name-field)