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Vulnerability Intelligence

CVE-1999-0067

Critical

phf CGI program allows remote command execution through shell metacharacters.

Published Mar 20, 1996 · Updated Apr 15, 2026

Key Facts

Patch immediately
  • CVE-1999-0067 is a critical-severity vulnerability (CVSS 10.0 v2) affecting HTTP Server (Apache), Ncsa Httpd.
  • It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
  • EPSS estimates a 87% probability of exploitation in the next 30 days.
  • No fixed version is listed yet; check the vendor advisory for mitigations.
  • Brandefense priority: patch immediately, because it is very likely to be exploited soon.

CVSS v2

10.0

AV:N/AC:L/Au:N/C:C/I:C/A:C

EPSS (30-day exploit likelihood)

87%

Higher than 99.7% of all scored CVEs

Exploited in the wild

No known

Not in a known-exploited catalog

Public exploit code

None known

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Description

phf CGI program allows remote command execution through shell metacharacters.

Affected Products

2 affected entries in total
ProductAffected versionsFixed in
HTTP ServerApache1.0.3n/a
Ncsa HttpdNcsa1.5an/a

Timeline

  1. Publicly disclosed

    Mar 20, 1996

  2. Last updated

    Apr 15, 2026

Weakness Type

  • CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

References

FAQ

Common Questions.

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