What is CVE-2002-0649?

CVE-2002-0649 is a vulnerability in Microsoft Data Engine, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. Published 2002-08-12.

Is CVE-2002-0649 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Microsoft Data Engine

CVE-2002-0649

Multiple buffer overflows in the Resolution Service for Microsoft SQL Server 2000 and Microsoft Desktop Engine 2000 (MSDE) allow remote attackers to cause a denial of service or execute arbitrary code via UDP packets to port 1434 in which (1) a 0x04 byte that causes the SQL Monitor thread to generate a long registry key name, or (2) a 0x08 byte with a long string causes heap corruption, as exploited by the Slammer/Sapphire worm.

Vulnerability class: Buffer Overflow

Published 2002-08-12 · last modified 2026-06-16.

CVSS v2 metric

CVSS v2 base score 7.5 (High). Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P. This CVE predates CVSS v3 and has no v3 score from NVD.

EPSS exploit prediction

EPSS: 0.848 (99.7th percentile), scored 2026-10-18.

High probability of exploitation in the next 30 days — patch promptly. 100th percentile — 99.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.848 · newest: 0.848 · change: 0.000

Affected products

Microsoft Data Engine — versions 2000
Microsoft SQL Server — versions 2000

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

Public proof-of-concept exploits

References

www.securityfocus.com/archive/1/308396/30/26150/threaded (mailing-list)
www.securityfocus.com/archive/1/308418/30/26150/threaded (mailing-list)
oval.cisecurity.org/repository/search/definition/oval:org.mitre.oval:def:1077 (signature, vdb-entry)
www.cert.org/advisories/CA-2002-22.html (US Government Resource, third-party-advisory)
www.kb.cert.org/vuls/id/484891 (US Government Resource, third-party-advisory)
www.kb.cert.org/vuls/id/399260 (US Government Resource, third-party-advisory)
marc.info/ (mailing-list)
secunia.com/advisories/7945 (Vendor Advisory, third-party-advisory)
www.securityfocus.com/archive/1/308806/30/26120/threaded (mailing-list)
www.securityfocus.com/archive/1/308324/30/26180/threaded (mailing-list)

Frequently asked questions

What is CVE-2002-0649?: CVE-2002-0649 is a vulnerability in Microsoft Data Engine, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. Published 2002-08-12.
Is CVE-2002-0649 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.