UpHeron
All vulnerabilities

Servers and applications

CVE-2002-0071

Buffer overflow in the ism.dll ISAPI extension that implements HTR scripting in Internet Information Server (IIS) 4.0 and 5.0 allows attackers to cause a denial of service or execute arbitrary code via HTR requests with long variable names.

Severity
High 7.5
Published
22 Apr 2002
Last changed
16 Jun 2026
Added to UpHeron
21 Oct 2026
Exploit chance
37% in the next 30 daysHigher than 98% of CVEs. EPSS by FIRST, 12 Nov 2026
Attack
Over the network · No login needed
Attacker can
Read some data · Change some data · Slow it down
CVSS vector
AV:N/AC:L/Au:N/C:P/I:P/A:P
Sources
NVD

Affected software

SoftwareAffected versions
Microsoft IISServers and applications · cpe:a:microsoft:internet_information_services
  • Version 5.0

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2002-0071
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2002-0071