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10.0High

Avirt Avirt Mail Server

CVE-2000-0971

Avirt Mail 4.0 and 4.2 allows remote attackers to cause a denial of service and possibly execute arbitrary commands via a long "RCPT TO" or "MAIL FROM" command.

What this means for your business

  • It affects Avirt Mail Server. 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 6% chance of attack attempts being seen in the next 30 days, ranking above 92% of all known flaws.

What to do

  1. 1Check whether your company or your suppliers run Avirt Mail Server, and which version. The affected versions are listed further down this page.
  2. 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.

Check if you’re exposedBook a call

Scoring

CVSS
10.0 (v2.0)
Vector
AV:N/AC:L/Au:N/C:C/I:C/A:C
Assigned by
cve@mitre.org

Dates

Published
2000-12-19
Last modified
2026-09-23
Sources
NVD

Affected products

  • Avirt Avirt Mail Server4.0, 4.2

As listed in the NVD configuration data. Not a statement about your estate.

References