What’s Vulnerable › Vulnerabilities

CVE-2002-1831

• Severity: medium (CVSS 5.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 22.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2002-12-31 · updated 2026-06-16

Description

Microsoft MSN Messenger Service 1.0 through 4.6 allows remote attackers to cause a denial of service (crash) via an invite request that contains hex-encoded spaces (%20) in the Invitation-Cookie field.

Affected products

• Microsoft Msn Messenger: 1.0, 2.0, 2.2, 3.0, 3.6, 4.0 (+2)

References

• http://online.securityfocus.com/archive/1/274086
• http://www.iss.net/security_center/static/9161.php
• http://www.securityfocus.com/bid/4827
• http://online.securityfocus.com/archive/1/274086
• http://www.iss.net/security_center/static/9161.php
• http://www.securityfocus.com/bid/4827

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