How severe is CVE-2009-0320?

CVE-2009-0320 has a CVSS 2.0 base score of 4.0, rated medium severity.

Is CVE-2009-0320 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-0320?

CVE-2009-0320 primarily affects Microsoft Windows Server 2003. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-0320?

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

When was CVE-2009-0320 published?

CVE-2009-0320 was published on 2009-01-28 and last updated on 2026-06-16.

CVE-2009-0320

CVE-2009-0320 is a medium-severity vulnerability in Microsoft Windows Server 2003 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-200.

Key facts

Severity: Medium (CVSS 2.0 base score 4.0)
EPSS exploit prediction: 1% (70th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Microsoft Windows Server 2003
Published: 2009-01-28
Last modified: 2026-06-16

Description

Microsoft Windows XP, Server 2003 and 2008, and Vista exposes I/O activity measurements of all processes, which allows local users to obtain sensitive information, as demonstrated by reading the I/O Other Bytes column in Task Manager (aka taskmgr.exe) to estimate the number of characters that a different user entered at a runas.exe password prompt, related to a "benchmarking attack."

Frequently asked questions

What is CVE-2009-0320?: Microsoft Windows XP, Server 2003 and 2008, and Vista exposes I/O activity measurements of all processes, which allows local users to obtain sensitive information, as demonstrated by reading the I/O Other Bytes column in Task Manager (aka taskmgr.exe) to estimate the number of characters that a different user entered at a runas.exe password prompt, related to a "benchmarking attack."
How severe is CVE-2009-0320?: CVE-2009-0320 has a CVSS 2.0 base score of 4.0, rated medium severity.
Is CVE-2009-0320 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-0320?: CVE-2009-0320 primarily affects Microsoft Windows Server 2003. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-0320?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-0320 published?: CVE-2009-0320 was published on 2009-01-28 and last updated on 2026-06-16.

References

Affected products (4)

cpe:2.3:o:microsoft:windows_server_2003:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_vista:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_xp:*:*:*:*:*:*:*:*

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