How severe is CVE-2011-0027?

CVE-2011-0027 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2011-0027 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 54% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-0027?

CVE-2011-0027 primarily affects Microsoft Data Access Components. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-0027?

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-2011-0027 published?

CVE-2011-0027 was published on 2011-01-12 and last updated on 2026-06-16.

CVE-2011-0027

CVE-2011-0027 is a critical-severity vulnerability in Microsoft Data Access Components with a CVSS 2.0 base score of 9.3. Its EPSS exploit-prediction score of 54% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-20.

Key facts

Severity: Critical (CVSS 2.0 base score 9.3)
EPSS exploit prediction: 54% (99th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Microsoft Data Access Components
Published: 2011-01-12
Last modified: 2026-06-16

Description

Microsoft Data Access Components (MDAC) 2.8 SP1 and SP2, and Windows Data Access Components (WDAC) 6.0, does not properly validate memory allocation for internal data structures, which allows remote attackers to execute arbitrary code, possibly via a large CacheSize property that triggers an integer wrap and a buffer overflow, aka "ADO Record Memory Vulnerability." NOTE: this might be a duplicate of CVE-2010-1117 or CVE-2010-1118.

Frequently asked questions

What is CVE-2011-0027?: Microsoft Data Access Components (MDAC) 2.8 SP1 and SP2, and Windows Data Access Components (WDAC) 6.0, does not properly validate memory allocation for internal data structures, which allows remote attackers to execute arbitrary code, possibly via a large CacheSize property that triggers an integer wrap and a buffer overflow, aka "ADO Record Memory Vulnerability." NOTE: this might be a duplicate of CVE-2010-1117 or CVE-2010-1118.
How severe is CVE-2011-0027?: CVE-2011-0027 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2011-0027 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 54% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-0027?: CVE-2011-0027 primarily affects Microsoft Data Access Components. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-0027?: 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-2011-0027 published?: CVE-2011-0027 was published on 2011-01-12 and last updated on 2026-06-16.

References

Affected products (3)

cpe:2.3:a:microsoft:data_access_components:2.8:sp1:*:*:*:*:*:*
cpe:2.3:a:microsoft:data_access_components:2.8:sp2:*:*:*:*:*:*
cpe:2.3:a:microsoft:windows_data_access_components:6.0:*:*:*:*:*:*:*

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