THREATPORT/VULNERABILITY/CVE-2006-3431
HIGH SEVERITY

CVE-2006-3431

Excel vulnerability

CVSS
7.5
EPSS
28.3%
EPSS pct
98th
Exploited
No known
Buffer overflow in certain Asian language versions of Microsoft Excel might allow user-assisted attackers to execute arbitrary code via a crafted STYLE record in a spreadsheet that triggers the overflow when the user attempts to repair the document or selects the "Style" option, as demonstrated by nanika.xls. NOTE: Microsoft has confirmed to CVE via e-mail that this is different than the other Excel vulnerabilities announced before 20060707, including CVE-2006-3059 and CVE-2006-3086.
Affected vendor
Microsoft
Affected product
Excel
CVSS vector
AV:N/AC:L/Au:N/C:P/I:P/A:P
Published
2006-07-07

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no authentication. Successful exploitation leads to partial impact to confidentiality, partial impact to integrity, partial impact to availability.

Its EPSS score of 28.3% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 98% of all scored CVEs.

Check your external exposure to CVE-2006-3431

  • Confirm whether Microsoft Excel is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2006-3431.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2006-3431

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2006-3431 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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