Is CVE-2011-1821 being actively exploited?

CVE-2011-1821 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2011-1821?

CVE-2011-1821 has a CVSS 2.0 base score of 4.0 (MEDIUM).

CVE-2011-1821

MEDIUM · CVSS 4.0EPSS 0.9%EU EUVD

IBM Tivoli Directory Server (TDS) 5.2 before 5.2.0.5-TIV-ITDS-IF0010 on Windows allows remote authenticated users to cause a denial of service (daemon hang) via a cn=changelog search.

Key facts

CVSS score: 4.0 (v2.0)
Severity: MEDIUM
CVSS vector: AV:N/AC:L/Au:S/C:N/I:N/A:P
Weakness (CWE): CWE-399
EPSS score: 0.9% (59th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2011-1819)
Published: April 21, 2011
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2011-1819 in the EU Vulnerability Database. Last updated in EUVD on September 16, 2024.

View on the EU Vulnerability Database

Affected products

ibm / tivoli directory server
ibm / tivoli directory server
microsoft / windows

References

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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