CVE-2020-36964
CVE-2020-36964 is a critical-severity vulnerability with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v4: 8.7
- EPSS exploit prediction: 0% (32nd percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2020-30885
- Weakness: CWE-787
- Published:
- Last modified:
Description
YATinyWinFTP contains a denial of service vulnerability that allows attackers to crash the FTP service by sending a 272-byte buffer with a trailing space. Attackers can exploit the service by connecting and sending a malformed command that triggers a buffer overflow and service crash.
Frequently asked questions
- What is CVE-2020-36964?
- YATinyWinFTP contains a denial of service vulnerability that allows attackers to crash the FTP service by sending a 272-byte buffer with a trailing space. Attackers can exploit the service by connecting and sending a malformed command that triggers a buffer overflow and service crash.
- How severe is CVE-2020-36964?
- CVE-2020-36964 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2020-36964 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2020-36964?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- Does CVE-2020-36964 have an EU (EUVD) identifier?
- Yes. CVE-2020-36964 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2020-30885.
- When was CVE-2020-36964 published?
- CVE-2020-36964 was published on 2026-01-28 and last updated on 2026-06-17.
References
- https://github.com/ik80/YATinyWinFTP
- https://www.exploit-db.com/exploits/49127
- https://www.vulncheck.com/advisories/yatinywinftp-denial-of-service
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