CVE-2002-1698

Buffer overflow in Microsoft MSN Messenger Service 1.0 through 4.6 allows remote attackers to cause a denial of service (crash) via a long FN (font) argument in the message header.

Published: 2002-12-31 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2002-1698 is rated Moderate Risk (48.2/100): CVSS Medium severity, with high exploitation likelihood (EPSS 18.87%, 95th 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-2002-1698

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 2025-03-30 25.27% 18.87% -6.40%
2 2025-03-29 18.87% 25.27% +6.40%
3 2025-03-19 — 18.87% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2002-1698

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2002-1698

Affected software / configurations for CVE-2002-1698

Vendor Product Version Raw CPE
microsoft msn_messenger 1.0 cpe:2.3:a:microsoft:msn_messenger:1.0:*:*:*:*:*:*:*
microsoft msn_messenger 2.0 cpe:2.3:a:microsoft:msn_messenger:2.0:*:*:*:*:*:*:*
microsoft msn_messenger 2.2 cpe:2.3:a:microsoft:msn_messenger:2.2:*:*:*:*:*:*:*
microsoft msn_messenger 3.0 cpe:2.3:a:microsoft:msn_messenger:3.0:*:*:*:*:*:*:*
microsoft msn_messenger 3.6 cpe:2.3:a:microsoft:msn_messenger:3.6:*:*:*:*:*:*:*
microsoft msn_messenger 4.0 cpe:2.3:a:microsoft:msn_messenger:4.0:*:*:*:*:*:*:*
microsoft msn_messenger 4.5 cpe:2.3:a:microsoft:msn_messenger:4.5:*:*:*:*:*:*:*
microsoft msn_messenger 4.6 cpe:2.3:a:microsoft:msn_messenger:4.6:*:*:*:*:*:*:*

References for CVE-2002-1698

cvelogic Threat Intelligence