CVE-2015-2521

CVE-2015-2521 is a critical-severity vulnerability in Microsoft Excel with a CVSS 2.0 base score of 9.3. Its EPSS exploit-prediction score of 28% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-119.

Key facts

Description

Microsoft Excel 2007 SP3, Excel 2010 SP2, Office Compatibility Pack SP3, and Excel Viewer allow remote attackers to execute arbitrary code via a crafted Office document, aka "Microsoft Office Memory Corruption Vulnerability."

Frequently asked questions

What is CVE-2015-2521?
Microsoft Excel 2007 SP3, Excel 2010 SP2, Office Compatibility Pack SP3, and Excel Viewer allow remote attackers to execute arbitrary code via a crafted Office document, aka "Microsoft Office Memory Corruption Vulnerability."
How severe is CVE-2015-2521?
CVE-2015-2521 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2015-2521 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 28% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-2521?
CVE-2015-2521 primarily affects Microsoft Excel. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2015-2521?
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-2015-2521 published?
CVE-2015-2521 was published on 2015-09-09 and last updated on 2026-06-17.

References

Affected products (5)

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