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CVE-2009-0641

37
FAUCET Score

CVE-2009-0641 describes a critical vulnerability in the telnetd daemon of FreeBSD 7.0-RELEASE and other 7.x versions. The flaw stems from an outdated method used to delete dangerous environment variables, allowing remote attackers to execute arbitrary code by passing crafted environment variables, such as an LD_PRELOAD value referencing a malicious library. This vulnerability carries a CVSS score of 9.3, indicating high severity with network-based attacks, medium complexity, and complete compromise of confidentiality, integrity, and availability. While not actively exploited in the wild and lacking Metasploit or Nuclei modules, an ExploitDB entry (EDB-8055) exists for privilege escalation, and despite its age, it has received minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
7.0CPE matchmatch criteria
cpe:2.3:o:freebsd:freebsd:7.0:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:freebsd:freebsd:7.0:beta_4:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:freebsd:freebsd:7.0:current:*:*:*:*:*:*
7.0-releaseCPE matchmatch criteria
cpe:2.3:o:freebsd:freebsd:7.0-release:*:*:*:*:*:*:*
7.0_beta4CPE matchmatch criteria
cpe:2.3:o:freebsd:freebsd:7.0_beta4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

9.3HIGH

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

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
9.35%
Probability of exploitation in next 30 days
EPSS Percentile
94.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
ExploitDB: EDB-8055 · Feb 16, 2009
This CVE's current EPSS score of 0.0935 is in the 75th percentile among its peer group of 8,920 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 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

lists.grok.org.uk / pipermail/full-disclosure/2009-February/067954.html
Exploit
security.freebsd.org / advisories/FreeBSD-SA-09:05.telnetd.asc
Patch
exchange.xforce.ibmcloud.com / vulnerabilities/48780
exploit-db.com / exploits/8055
securityfocus.com / bid/33777
Exploit