How severe is CVE-2011-1821?

CVE-2011-1821 has a CVSS 2.0 base score of 4.0, rated medium severity.

Is CVE-2011-1821 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-1821?

CVE-2011-1821 primarily affects Ibm Tivoli Directory Server. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-1821?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2011-1821 published?

CVE-2011-1821 was published on 2011-04-21 and last updated on 2026-06-16.

CVE-2011-1821

CVE-2011-1821 is a medium-severity vulnerability in Ibm Tivoli Directory Server with a CVSS 2.0 base score of 4.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-399.

Key facts

Severity: Medium (CVSS 2.0 base score 4.0)
EPSS exploit prediction: 1% (55th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Ibm Tivoli Directory Server
Published: 2011-04-21
Last modified: 2026-06-16

Description

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.

Frequently asked questions

What is CVE-2011-1821?: 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.
How severe is CVE-2011-1821?: CVE-2011-1821 has a CVSS 2.0 base score of 4.0, rated medium severity.
Is CVE-2011-1821 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-1821?: CVE-2011-1821 primarily affects Ibm Tivoli Directory Server. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-1821?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-1821 published?: CVE-2011-1821 was published on 2011-04-21 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:ibm:tivoli_directory_server:5.2.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:tivoli_directory_server:5.2.0.4:*:*:*:*:*:*:*

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Other CWE-399 (Resource Management Errors) vulnerabilities

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CVE-2015-0339 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2015-0335 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2015-0333 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2014-4121 — Critical (CVSS 10.0): Microsoft .NET Framework 2.0 SP2, 3.5, 3.5.1, 4, 4.5, 4.5.1, and 4.5.2 does not properly parse internationalized…
CVE-2014-0560 — Critical (CVSS 10.0): Use-after-free vulnerability in Adobe Reader and Acrobat 10.x before 10.1.12 and 11.x before 11.0.09 on Windows and OS…

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