THREATPORT/VULNERABILITY/CVE-2015-2423
MEDIUM SEVERITY

CVE-2015-2423

Excel vulnerability

CVSS
4.3
EPSS
19.9%
EPSS pct
97th
Exploited
No known
Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT Gold and 8.1, Windows 10, Excel 2007 SP3, PowerPoint 2007 SP3, Visio 2007 SP3, Word 2007 SP3, Office 2010 SP2, Excel 2010 SP2, PowerPoint 2010 SP2, Visio 2010 SP2, Word 2010 SP2, Excel 2013 SP1, PowerPoint 2013 SP1, Visio 2013 SP1, Word 2013 SP1, Excel 2013 RT SP1, PowerPoint 2013 RT SP1, Visio 2013 RT SP1, Word 2013 RT SP1, and Internet Explorer 7 through 11 allow remote attackers to gain privileges and obtain sensitive information via a crafted command-line parameter to an Office application or Notepad, as demonstrated by a transition from Low Integrity to Medium Integrity, aka "Unsafe Command Line Parameter Passing Vulnerability."
Affected vendor
Microsoft
Affected product
Excel
CVSS vector
AV:N/AC:M/Au:N/C:P/I:N/A:N
Weakness type (CWE)
  • CWE-200 — Exposure of Sensitive Information
Published
2015-08-15

Risk analysis

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

Its EPSS score of 19.9% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 97% of all scored CVEs.

Check your external exposure to CVE-2015-2423

  • Confirm whether Microsoft Excel is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2015-2423.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2015-2423

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2015-2423 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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