How severe is CVE-1999-1011?

CVE-1999-1011 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-1999-1011 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 77% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-1999-1011?

CVE-1999-1011 primarily affects Microsoft Data Access Components. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-1999-1011?

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-1999-1011 published?

CVE-1999-1011 was published on 1999-07-19 and last updated on 2026-06-16.

CVE-1999-1011

CVE-1999-1011 is a critical-severity vulnerability in Microsoft Data Access Components with a CVSS 2.0 base score of 10.0. Its EPSS exploit-prediction score of 77% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-264.

Key facts

Severity: Critical (CVSS 2.0 base score 10.0)
EPSS exploit prediction: 77% (99th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Microsoft Data Access Components
Published: 1999-07-19
Last modified: 2026-06-16

Description

The Remote Data Service (RDS) DataFactory component of Microsoft Data Access Components (MDAC) in IIS 3.x and 4.x exposes unsafe methods, which allows remote attackers to execute arbitrary commands.

Frequently asked questions

What is CVE-1999-1011?: The Remote Data Service (RDS) DataFactory component of Microsoft Data Access Components (MDAC) in IIS 3.x and 4.x exposes unsafe methods, which allows remote attackers to execute arbitrary commands.
How severe is CVE-1999-1011?: CVE-1999-1011 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-1999-1011 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 77% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-1011?: CVE-1999-1011 primarily affects Microsoft Data Access Components. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-1999-1011?: 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-1999-1011 published?: CVE-1999-1011 was published on 1999-07-19 and last updated on 2026-06-16.

References

Affected products (7)

cpe:2.3:a:microsoft:data_access_components:1.5:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:data_access_components:2.0:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:data_access_components:2.1:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:index_server:2.0:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_information_server:3.0:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_information_server:4.0:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:site_server:3.0:*:*:*:*:*:*:*

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