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CVE-2000-1056

19
FAUCET Score

CVE-2000-1056 describes a critical vulnerability in CiscoSecure ACS Server versions 2.4(2) and earlier, allowing remote attackers to bypass LDAP authentication. This is possible if the LDAP server is configured to permit null passwords, effectively granting unauthorized access. With a CVSS score of 7.5 (HIGH), this vulnerability has a network-based attack vector, low complexity, and can lead to full compromise of confidentiality, integrity, and availability. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this older vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
2.1CPE matchmatch criteria
cpe:2.3:a:cisco:secure_access_control_server:2.1:*:windows_nt:*:*:*:*:*
2.3\(3\)CPE matchmatch criteria
cpe:2.3:a:cisco:secure_access_control_server:2.3\(3\):*:windows_nt:*:*:*:*:*
2.4\(2\)CPE matchmatch criteria
cpe:2.3:a:cisco:secure_access_control_server:2.4\(2\):*:windows_nt:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.5HIGH

AV:N/AC:L/Au:N/C:P/I:P/A:P

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.69%
Probability of exploitation in next 30 days
EPSS Percentile
74.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0169 is in the 57th percentile among its peer group of 51,506 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

exchange.xforce.ibmcloud.com / vulnerabilities/5274
cisco.com / warp/public/707/csecureacsnt-pub.shtml
PatchVendor Advisory
securityfocus.com / bid/1708
PatchVendor Advisory