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CVE-1999-0067

77
FAUCET Score

CVE-1999-0067 describes a critical remote command execution vulnerability in the phf CGI program, affecting Apache HTTP Server and NCSA HTTPd. This flaw allows unauthenticated attackers to execute arbitrary commands by injecting shell metacharacters into requests. With a CVSS score of 10.0, it represents a high-severity threat with complete compromise of confidentiality, integrity, and availability. Despite its age and high EPSS score, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
1.0.3CPE matchmatch criteria
cpe:2.3:a:apache:http_server:1.0.3:*:*:*:*:*:*:*
1.5aCPE matchmatch criteria
cpe:2.3:a:ncsa:ncsa_httpd:1.5a:*:export:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

10.0HIGH

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

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
86.87%
Probability of exploitation in next 30 days
EPSS Percentile
99.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.8687 is in the 100th percentile among its peer group of 51,466 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

cert.org / advisories/CA-1996-06.html
Third Party AdvisoryUS Government Resource
osvdb.org / 136
Broken Link
securityfocus.com / bid/629
Broken LinkThird Party AdvisoryVDB Entry