Security readout for executives and security teams
CVE-2001-0239 is a denial-of-service issue in Microsoft ISA Server 2000 Web Proxy. A remote attacker could make the proxy service unavailable using an overly long web request of a specific type. The provided sources do not indicate data theft, code execution, or confirmed active exploitation. Exposure is most likely in legacy environments still running Microsoft ISA Server 2000 Web Proxy, especially where proxy access is reachable from untrusted networks. Modern environments are unlikely to be affected unless old ISA infrastructure remains deployed. Treat this as a legacy infrastructure risk. It is not presented as a data-breach vulnerability, but exposed old proxy services can disrupt business connectivity and indicate broader unsupported-system risk. Mitigation focus: Check Microsoft MS01-021 guidance for the vendor-approved update or workaround.; Retire or isolate any remaining ISA Server 2000 Web Proxy systems.; Restrict proxy access to trusted networks and authenticated users where possible..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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CVE-2001-0239 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- MS01-021CVE reference · vendor-advisory, x_refsource_MS
- isa-web-proxy-dos(6383)CVE reference · vdb-entry, x_refsource_XF
Products and packages named in the record
CWE details
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