How severe is CVE-2009-2527?

CVE-2009-2527 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2009-2527 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 27% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-2527?

CVE-2009-2527 affects Microsoft Windows Media Player. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2009-2527?

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-2009-2527 published?

CVE-2009-2527 was published on 2009-10-14 and last updated on 2026-06-16.

CVE-2009-2527

CVE-2009-2527 is a critical-severity vulnerability in Microsoft Windows Media Player with a CVSS 2.0 base score of 9.3. Its EPSS exploit-prediction score of 27% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-119.

Key facts

Severity: Critical (CVSS 2.0 base score 9.3)
EPSS exploit prediction: 27% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Microsoft Windows Media Player
Published: 2009-10-14
Last modified: 2026-06-16

Description

Heap-based buffer overflow in Microsoft Windows Media Player 6.4 allows remote attackers to execute arbitrary code via (1) a crafted ASF file or (2) crafted streaming content, aka "WMP Heap Overflow Vulnerability."

Frequently asked questions

What is CVE-2009-2527?: Heap-based buffer overflow in Microsoft Windows Media Player 6.4 allows remote attackers to execute arbitrary code via (1) a crafted ASF file or (2) crafted streaming content, aka "WMP Heap Overflow Vulnerability."
How severe is CVE-2009-2527?: CVE-2009-2527 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2009-2527 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 27% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-2527?: CVE-2009-2527 affects Microsoft Windows Media Player. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2009-2527?: 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-2009-2527 published?: CVE-2009-2527 was published on 2009-10-14 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:microsoft:windows_media_player:6.4:*:*:*:*:*:*:*

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