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CVE-2002-1831

32
FAUCET Score

CVE-2002-1831 describes a denial-of-service vulnerability affecting Microsoft MSN Messenger Service versions 1.0 through 4.6. Remote attackers can crash the application by sending an invite request with hex-encoded spaces in the Invitation-Cookie field. This vulnerability has a CVSS score of 5.0, indicating a medium severity, with a network attack vector, low complexity, and potential for partial availability impact. While not listed in CISA's KEV catalog, exploit code is publicly available via ExploitDB, though there is no evidence of active exploitation or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
1.0CPE matchmatch criteria
cpe:2.3:a:microsoft:msn_messenger:1.0:*:*:*:*:*:*:*
2.0CPE matchmatch criteria
cpe:2.3:a:microsoft:msn_messenger:2.0:*:*:*:*:*:*:*
2.2CPE matchmatch criteria
cpe:2.3:a:microsoft:msn_messenger:2.2:*:*:*:*:*:*:*
3.0CPE matchmatch criteria
cpe:2.3:a:microsoft:msn_messenger:3.0:*:*:*:*:*:*:*
3.6CPE matchmatch criteria
cpe:2.3:a:microsoft:msn_messenger:3.6:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

AV:N/AC:L/Au:N/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
22.26%
Probability of exploitation in next 30 days
EPSS Percentile
97.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
ExploitDB: EDB-21481 · May 24, 2002
This CVE's current EPSS score of 0.2226 is in the 97th percentile among its peer group of 23,703 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

online.securityfocus.com / archive/1/274086
iss.net / security_center/static/9161.php
securityfocus.com / bid/4827
Exploit