7.5High
Cat Soft Serv-U
CVE-2000-1033
Serv-U FTP Server allows remote attackers to bypass its anti-hammering feature by first logging on as a valid user (possibly anonymous) and then attempting to guess the passwords of other users.
What this means for your business
- It affects Cat Soft Serv-U. It matters if your company, or a supplier that handles your data, runs it.
- Code showing how to exploit it has been published, but real attacks have not been confirmed.
- An attacker can use it remotely, over a network.
- FIRST's prediction model gives it a 8% chance of attack attempts being seen in the next 30 days, ranking above 94% of all known flaws.
What to do
- 1Check whether your company or your suppliers run Cat Soft Serv-U, and which version. The affected versions are listed further down this page.
- 2If you do, apply the vendor's fix. A patch or vendor advisory has been published.
Not sure if your company is exposed?
Fastnexa’s certified penetration testers can check whether attackers could use this flaw, or others like it, against your websites, apps and network. The full test is free for our first 10 founding clients until 31 December 2026.
Scoring
- CVSS
- 7.5 (v2.0)
- Vector
AV:N/AC:L/Au:N/C:P/I:P/A:P- Assigned by
- cve@mitre.org
Dates
- Published
- 2000-12-11
- Last modified
- 2026-09-23
- Sources
- NVD
Affected products
- Cat Soft Serv-U2.5x
As listed in the NVD configuration data. Not a statement about your estate.