The cryptographic module in ScatterChat 1.0.x allows attackers to identify patterns in large numbers of messages by identifying collisions using a birthday attack on the custom padding mechanism for ECB mode encryption.
CVE-2006-4021
NONECVSS 0.0
0.0
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- No confirmed exploitation signals yet
CISA-KEV: Not listedEPSS: 1%CVSS: —Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- —
- EG Score
- 0.0(none)
- EPSS
- 46.0%
- KEV
- Not listed
Published
August 17, 2006
Last Modified
April 16, 2026
References (10)
- cve@mitrehttp://securityreason.com/securityalert/1396
- cve@mitrehttp://www.scatterchat.com/advisories/2006-01_non_tech.html
- cve@mitrehttp://www.scatterchat.com/advisories/2006-01_tech.html
- cve@mitrehttp://www.securityfocus.com/archive/1/443038/100/100/threaded
- cve@mitrehttp://www.securityfocus.com/bid/19485
- af854a3a-2127-422b-91ae-364da2661108http://securityreason.com/securityalert/1396
- af854a3a-2127-422b-91ae-364da2661108http://www.scatterchat.com/advisories/2006-01_non_tech.html
- af854a3a-2127-422b-91ae-364da2661108http://www.scatterchat.com/advisories/2006-01_tech.html
- af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/archive/1/443038/100/100/threaded
- af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/19485
Frequently asked(4)
What is CVE-2006-4021?
CVE-2006-4021 is a none vulnerability published on August 17, 2006. The cryptographic module in ScatterChat 1.0.x allows attackers to identify patterns in large numbers of messages by identifying collisions using a birthday attack on the custom padding mechanism for ECB mode encryption.
When was CVE-2006-4021 disclosed?
CVE-2006-4021 was first published in the National Vulnerability Database on August 17, 2006, with the most recent update on April 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2006-4021 actively exploited?
CVE-2006-4021 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 46.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
How do I remediate CVE-2006-4021?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2006-4021, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2006-4021
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