How severe is CVE-2011-1033?

CVE-2011-1033 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2011-1033 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-1033?

CVE-2011-1033 affects Ibm Informix Dynamic Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2011-1033?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2011-1033 published?

CVE-2011-1033 was published on 2011-02-15 and last updated on 2026-06-16.

CVE-2011-1033

CVE-2011-1033 is a critical-severity vulnerability in Ibm Informix Dynamic Server with a CVSS 2.0 base score of 9.3. 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-119.

Key facts

Severity: Critical (CVSS 2.0 base score 9.3)
EPSS exploit prediction: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Ibm Informix Dynamic Server
Published: 2011-02-15
Last modified: 2026-06-16

Description

Stack-based buffer overflow in oninit in IBM Informix Dynamic Server (IDS) 11.50 allows remote attackers to execute arbitrary code via crafted arguments in the USELASTCOMMITTED session environment option in a SQL SET ENVIRONMENT statement.

Frequently asked questions

What is CVE-2011-1033?: Stack-based buffer overflow in oninit in IBM Informix Dynamic Server (IDS) 11.50 allows remote attackers to execute arbitrary code via crafted arguments in the USELASTCOMMITTED session environment option in a SQL SET ENVIRONMENT statement.
How severe is CVE-2011-1033?: CVE-2011-1033 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2011-1033 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-1033?: CVE-2011-1033 affects Ibm Informix Dynamic Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2011-1033?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2011-1033 published?: CVE-2011-1033 was published on 2011-02-15 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:ibm:informix_dynamic_server:11.50:*:*:*:*:*:*:*

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