CVE-2019-25686
Core FTP 2.0 build 653 PBSZ Unauthenticated Denial of Service
- State
- Published
- Severity
- 8.7 High
- Published
- Apr 5, 2026
- Updated
- Apr 6, 2026
- Reserved
- Apr 5, 2026
Description
Core FTP 2.0 build 653 contains a denial of service vulnerability in the PBSZ command that allows unauthenticated attackers to crash the service by sending a malformed command with an oversized buffer. Attackers can send a PBSZ command with a payload exceeding 211 bytes to trigger an access violation and crash the FTP server process.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.7 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | VulnCheck |
Weaknesses
- CWE-306 Missing Authentication for Critical Function
Affected Products
| Product | Versions |
|---|---|
Core FTPCoreftp |
|
References
- ExploitDB-46532exploit
- Official Product Homepageproduct
- Product Referenceproduct
- VulnCheck Advisory: Core FTP 2.0 build 653 PBSZ Unauthenticated Denial of Servicethird-party-advisory
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