CVE-2011-1986

CVE-2011-1986 is a critical-severity vulnerability in Microsoft Excel with a CVSS 2.0 base score of 9.3. Its EPSS exploit-prediction score of 22% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-399.

Key facts

Description

Use-after-free vulnerability in Microsoft Excel 2003 SP3 allows remote attackers to execute arbitrary code via a crafted spreadsheet, aka "Excel Use after Free WriteAV Vulnerability."

Frequently asked questions

What is CVE-2011-1986?
Use-after-free vulnerability in Microsoft Excel 2003 SP3 allows remote attackers to execute arbitrary code via a crafted spreadsheet, aka "Excel Use after Free WriteAV Vulnerability."
How severe is CVE-2011-1986?
CVE-2011-1986 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2011-1986 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 22% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-1986?
CVE-2011-1986 affects Microsoft Excel. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2011-1986?
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-2011-1986 published?
CVE-2011-1986 was published on 2011-09-15 and last updated on 2026-06-16.

References

Affected products (1)

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