THREATPORT/VULNERABILITY/CVE-2004-0121
HIGH SEVERITY

CVE-2004-0121

Office vulnerability

CVSS
7.5
EPSS
47.7%
EPSS pct
99th
Exploited
No known
Argument injection vulnerability in Microsoft Outlook 2002 does not sufficiently filter parameters of mailto: URLs when using them as arguments when calling OUTLOOK.EXE, which allows remote attackers to use script code in the Local Machine zone and execute arbitrary programs.
Affected vendor
Microsoft
Affected product
Office
CVSS vector
AV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness type (CWE)
Published
2004-04-15

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 47.7% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it among the most exploited CVEs currently tracked.

Check your external exposure to CVE-2004-0121

  • Confirm whether Microsoft Office is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2004-0121.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2004-0121

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2004-0121 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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