THREATPORT/VULNERABILITY/CVE-2000-0621
HIGH SEVERITY

CVE-2000-0621

Outlook vulnerability

CVSS
7.5
EPSS
22.3%
EPSS pct
97th
Exploited
No known
Microsoft Outlook 98 and 2000, and Outlook Express 4.0x and 5.0x, allow remote attackers to read files on the client's system via a malformed HTML message that stores files outside of the cache, aka the "Cache Bypass" vulnerability.
Affected vendor
Microsoft
Affected product
Outlook
CVSS vector
AV:N/AC:L/Au:N/C:P/I:P/A:P
Published
2000-07-20

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 22.3% 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-2000-0621

  • Confirm whether Microsoft Outlook is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2000-0621.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2000-0621

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2000-0621 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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