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-2009-4086

24
FAUCET Score

CVE-2009-4086 describes a CRLF injection vulnerability in Xerver HTTP Server versions 4.31 and 4.32, allowing remote attackers to inject arbitrary HTTP headers. This flaw can lead to HTTP response splitting attacks through specific byte sequences appended to a URL. Rated with a CVSS score of 5.0, it is a low-complexity attack requiring no authentication, primarily impacting integrity (partial) but not confidentiality or availability. While not actively exploited in the wild or on the KEV catalog, public exploit code exists on ExploitDB, though there is minimal community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
4.31CPE matchmatch criteria
cpe:2.3:a:javascript:xerver_http_server:4.31:*:*:*:*:*:*:*
4.32CPE matchmatch criteria
cpe:2.3:a:javascript:xerver_http_server:4.32:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
4.76%
Probability of exploitation in next 30 days
EPSS Percentile
91.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
ExploitDB: EDB-10170 · Nov 18, 2009
This CVE's current EPSS score of 0.0476 is in the 88th percentile among its peer group of 23,701 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, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Remediation records are not available for this CVE.

References

packetstormsecurity.org / 0911-exploits/xerver-split.txt
Exploit
secunia.com / advisories/36681
Vendor Advisory
exchange.xforce.ibmcloud.com / vulnerabilities/54356
securityfocus.com / bid/37064
Exploit