CVE-2002-1831

NONECVSS 0.0Weaponized

0.0

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.

CVSS v3: —
EG Score: —
EPSS: 93.3%
KEV: Not listed

Published

December 31, 2002

Last Modified

April 16, 2026

References (6)

cve@mitrehttp://online.securityfocus.com/archive/1/274086
cve@mitrehttp://www.iss.net/security_center/static/9161.php
cve@mitrehttp://www.securityfocus.com/bid/4827
af854a3a-2127-422b-91ae-364da2661108http://online.securityfocus.com/archive/1/274086
af854a3a-2127-422b-91ae-364da2661108http://www.iss.net/security_center/static/9161.php
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/4827

Data Freshness Timeline

(refreshed 10× in last 7d / 15× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-29 13:40 UTCepss_batch
2026-05-29 13:40 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-27 13:37 UTCepss_batch
2026-05-26 13:41 UTCepss_batch
2026-05-26 13:41 UTCepss_batch
2026-05-24 16:42 UTCepss_batch
2026-05-22 21:15 UTCepss_batch
2026-05-20 22:36 UTCepss_batch
2026-05-20 11:20 UTCepss_batch
2026-05-20 11:20 UTCepss_batch
2026-05-18 21:29 UTCepss_batch
2026-05-18 21:29 UTCepss_batch

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

Exploit-DBEDB-21481✓ verified
First seen May 24, 2002
Microsoft MSN Messenger 1 < 4 - Malformed Invite Request Denial of Service
Open source ↗

Frequently asked(4)

What is CVE-2002-1831?

CVE-2002-1831 is a none vulnerability published on December 31, 2002. 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.

When was CVE-2002-1831 disclosed?

CVE-2002-1831 was first published in the National Vulnerability Database on December 31, 2002, with the most recent update on April 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2002-1831 actively exploited?

CVE-2002-1831 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 93.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-2002-1831?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2002-1831, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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CVE-2002-1831

📅 Published

🔄 Last Modified

🔗 References (6)