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Vulnerabilities

Vulnerability · CVE-2001-1342

Apache before 1.3.20 on Windows and OS/2 systems allows remote attackers to cause a denial of service (GPF) via an HTTP request for a URI that contains a large number…

Published May 12, 2001 · catalog updated Jun 16, 2026 · http server

Last checked Nov 4, 2026. A connected source was read within the last 7 days.

Check this week

CVE-2001-1342 is not in CISA KEV. FIRST estimates a 30.01% chance of exploitation in the next 30 days. Check whether you run http server.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Medium5.0
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
30.01%
Remediation
Advisory link
Affected products
cpe apache/http server

Apache before 1.3.20 on Windows and OS/2 systems allows remote attackers to cause a denial of service (GPF) via an HTTP request for a URI that contains a large number of / (slash) or other characters, which causes certain functions to dereference a null pointer.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe apache/http server1.3.12
  • cpe apache/http server1.3.14
  • cpe apache/http server1.3.15
  • cpe apache/http server1.3.16
  • cpe apache/http server1.3.17
  • cpe apache/http server1.3.18

How to fix CVE-2001-1342

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2001-1342 is not in CISA KEV. FIRST estimates a 30.01% chance of exploitation in the next 30 days. Check whether you run http server.

Which versions are affected?

Compare what you have installed with apache/http server 1.3.12; apache/http server 1.3.14; apache/http server 1.3.15; apache/http server 1.3.16. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 30.01%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Apache HTTP Server security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. May 12, 2001 · Monitored products — critical

    Detected

    Apache before 1.3.20 on Windows and OS/2 systems allows remote attackers to cause a denial of service (GPF) via an HTTP request for a URI that contains a large number of / (slash) or other characters, which causes certain functions to dereference a null pointer.

  2. Jun 16, 2026 · Monitored products — critical

    Updated

    Apache before 1.3.20 on Windows and OS/2 systems allows remote attackers to cause a denial of service (GPF) via an HTTP request for a URI that contains a large number of / (slash) or other characters, which causes certain functions to dereference a null pointer.

Sources

  • CVE.orgVulnerability recordCVE-2001-1342

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2001-1342

    30-day exploitation probability 30.01%

    first.org
  • Monitored products — criticalVendor advisoryCVE-2001-1342

    Apache before 1.3.20 on Windows and OS/2 systems allows remote attackers to cause a denial of service (GPF) via an HTTP request for a URI that contains a large number of / (slash) or other characters, which causes certain functions to dereference a null pointer.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Nov 4, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 4, 2026
  • CVE.orgNov 4, 2026
  • Monitored products — criticalNov 3, 2026