CVE-2006-6603

Buffer overflow in the YMMAPI.YMailAttach ActiveX control (ymmapi.dll) before 2005.1.1.4 in Yahoo! Messenger allows remote attackers to execute arbitrary code via a crafted HTML document. NOTE: some details were obtained from third party information.

Published: 2006-12-15 Last update: 2026-04-23 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2006-6603 is rated High Risk (69.1/100): CVSS Critical severity, with high exploitation likelihood (EPSS 8.00%, 92th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2006-6603

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-09-25 8.20% 8.00% -0.20%
2 2025-08-17 6.69% 8.20% +1.51%
3 2025-08-03 — 6.69% —

Full EPSS history (12 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2006-6603

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.3 2.0 HIGH
AV:N/AC:M/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 8.6 10.0 [email protected]

Weakness enumeration for CVE-2006-6603

OS Trackers for CVE-2006-6603

vendor priority summary link
alpine — CVE-2006-6603: no source package rows; 0 state rows across 0 repos (none); fixed 0, open 0. https://security.alpinelinux.org/vuln/CVE-2006-6603

Affected software / configurations for CVE-2006-6603

Vendor Product Version Raw CPE
yahoo messenger <= 8.0 cpe:2.3:a:yahoo:messenger:*:*:*:*:*:*:*:*
yahoo messenger 5.0 cpe:2.3:a:yahoo:messenger:5.0:*:*:*:*:*:*:*
yahoo messenger 5.5 cpe:2.3:a:yahoo:messenger:5.5:*:*:*:*:*:*:*
yahoo messenger 5.6 cpe:2.3:a:yahoo:messenger:5.6:*:*:*:*:*:*:*
yahoo messenger 6.0 cpe:2.3:a:yahoo:messenger:6.0:*:*:*:*:*:*:*
yahoo messenger 7.0 cpe:2.3:a:yahoo:messenger:7.0:*:*:*:*:*:*:*
yahoo messenger 7.5 cpe:2.3:a:yahoo:messenger:7.5:*:*:*:*:*:*:*

References for CVE-2006-6603

cvelogic Threat Intelligence