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CVE-2004-0201

48
FAUCET Score

CVE-2004-0201 describes a critical heap-based buffer overflow vulnerability in Microsoft's HtmlHelp program (hh.exe), affecting various Windows operating systems from 98 to Server 2003, as well as Avaya products. This flaw allows remote attackers to execute arbitrary commands by crafting a malicious .CHM file with an oversized length field. With a CVSS score of 10.0, it represents a severe risk, as it can be exploited remotely with low attack complexity, leading to complete compromise of confidentiality, integrity, and availability. While no active exploitation, public exploit code, or significant community discussion is currently reported, its high FAUCET Risk Score of 97/100 and EPSS percentile indicate a notable potential for future exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:a:avaya:ip600_media_servers:*:*:*:*:*:*:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:h:avaya:definity_one_media_server:*:*:*:*:*:*:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:h:avaya:s8100:*:*:*:*:*:*:*:*
s3400CPE matchmatch criteria
cpe:2.3:o:avaya:modular_messaging_message_storage_server:s3400:*:*:*:*:*:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_2000:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

10.0HIGH

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

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

Exploit Intelligence

EPSS Score
45.31%
Probability of exploitation in next 30 days
EPSS Percentile
98.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.4531 is in the 98th percentile among its peer group of 51,466 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, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

lists.grok.org.uk / pipermail/full-disclosure/2004-July/023919.html
docs.microsoft.com / en-us/security-updates/securitybulletins/2004/ms04-023
exchange.xforce.ibmcloud.com / vulnerabilities/16586
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1503
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1530
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A2155
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A3179
kb.cert.org / vuls/id/920060
PatchThird Party AdvisoryUS Government Resource
us-cert.gov / cas/techalerts/TA04-196A.html
PatchThird Party AdvisoryUS Government Resource