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CVE-2006-4520

21
FAUCET Score

CVE-2006-4520 describes a denial-of-service vulnerability in Novell eDirectory versions before 8.7.3 SP9 and 8.8.x before 8.8.1 FTF2. This flaw allows unauthenticated remote attackers to crash the daemon by sending specially crafted NCP fragments with negative lengths, leading to a heap write to a log file. With a CVSS score of 7.8, this vulnerability is considered high severity due to its network-based attack vector and low attack complexity, resulting in a complete loss of availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 8.7.3.8CPE matchmatch criteria
cpe:2.3:a:novell:edirectory:*:*:*:*:*:*:*:*
8.8CPE matchmatch criteria
cpe:2.3:a:novell:edirectory:8.8:*:*:*:*:*:*:*
8.8.1CPE matchmatch criteria
cpe:2.3:a:novell:edirectory:8.8.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.8HIGH

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.93%
Probability of exploitation in next 30 days
EPSS Percentile
85.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0293 is in the 74th percentile among its peer group of 51,553 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

labs.idefense.com / intelligence/vulnerabilities/display.php
Vendor Advisory
exchange.xforce.ibmcloud.com / vulnerabilities/33921
novell.com / support/search.do
Patch
securityfocus.com / bid/23685
securitytracker.com / id
vupen.com / english/advisories/2007/1550