Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2009-3663

42
FAUCET Score

CVE-2009-3663 is a critical format string vulnerability in the h_readrequest function of httpdx Web Server version 1.4. An unauthenticated remote attacker can exploit this flaw by sending specially crafted Host headers containing format string specifiers. This can lead to a denial of service (crash) or, more severely, arbitrary code execution on the affected server. While not listed in CISA's KEV catalog, public exploit code exists, demonstrating its potential for exploitation. Despite its high CVSS score of 10.0 and FAUCET Risk Score of 97/100, there is minimal community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
1.4CPE matchmatch criteria
cpe:2.3:a:jasper:httpdx:1.4:*:*:*:*:*:*:*

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
14.63%
Probability of exploitation in next 30 days
EPSS Percentile
96.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
ExploitDB: EDB-9657 · Sep 14, 2009
This CVE's current EPSS score of 0.1463 is in the 94th percentile among its peer group of 51,455 CVEs.

Social Chatter

No social media mentions found for this CVE.

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

httpdx.sourceforge.net / downloads/changelog.log
osvdb.org / 58129
secunia.com / advisories/36734
Vendor Advisory
exchange.xforce.ibmcloud.com / vulnerabilities/53205
exploit-db.com / exploits/9657
vupen.com / english/advisories/2009/2654
PatchVendor Advisory