CVE-2002-0155

CVE-2002-0155 is a high-severity vulnerability in Microsoft Msn Chat Control with a CVSS 2.0 base score of 7.5. Its EPSS exploit-prediction score of 24% places it in the 98th percentile, indicating an elevated likelihood of exploitation.

Key facts

Description

Buffer overflow in Microsoft MSN Chat ActiveX Control, as used in MSN Messenger 4.5 and 4.6, and Exchange Instant Messenger 4.5 and 4.6, allows remote attackers to execute arbitrary code via a long ResDLL parameter in the MSNChat OCX.

Frequently asked questions

What is CVE-2002-0155?
Buffer overflow in Microsoft MSN Chat ActiveX Control, as used in MSN Messenger 4.5 and 4.6, and Exchange Instant Messenger 4.5 and 4.6, allows remote attackers to execute arbitrary code via a long ResDLL parameter in the MSNChat OCX.
How severe is CVE-2002-0155?
CVE-2002-0155 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2002-0155 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 24% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2002-0155?
CVE-2002-0155 primarily affects Microsoft Msn Chat Control. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2002-0155?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2002-0155 published?
CVE-2002-0155 was published on 2002-05-29 and last updated on 2026-06-16.

References

Affected products (5)