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7.5High

Cisco Secure Access Control Server

CVE-2000-1056

CiscoSecure ACS Server 2.4(2) and earlier allows remote attackers to bypass LDAP authentication on the server if the LDAP server allows null passwords.

What this means for your business

  • It affects Cisco Secure Access Control Server. It matters if your company, or a supplier that handles your data, runs it.
  • An attacker can use it remotely, over a network.
  • FIRST's prediction model gives it a 2% chance of attack attempts being seen in the next 30 days, ranking above 76% of all known flaws.

What to do

  1. 1Check whether your company or your suppliers run Cisco Secure Access Control 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
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

  • Cisco Secure Access Control Server2.1, 2.3\(3\), 2.4\(2\)

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

References