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CVE-2006-4021

12
FAUCET Score

CVE-2006-4021 describes a cryptographic vulnerability in ScatterChat 1.0.x. Attackers can exploit a weakness in the custom padding mechanism for ECB mode encryption to identify patterns in encrypted messages using a birthday attack. This vulnerability has a low severity CVSS score of 2.6, indicating a network-based attack with high access complexity and potential for partial confidentiality compromise. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
1.0.1CPE matchmatch criteria
cpe:2.3:a:scatterchat:scatterchat:1.0.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

2.6LOW

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

Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
HIGH
Authentication
NONE
Exploitability Score
4.9
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.65%
Probability of exploitation in next 30 days
EPSS Percentile
47.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0065 is in the 30th percentile among its peer group of 1,506 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 0.3 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

securityreason.com / securityalert/1396
scatterchat.com / advisories/2006-01_non_tech.html
Vendor AdvisoryURL Repurposed
scatterchat.com / advisories/2006-01_tech.html
Vendor AdvisoryURL Repurposed
securityfocus.com / archive/1/443038/100/100/threaded
securityfocus.com / bid/19485