The HTML Help ActiveX control (Hhctrl.ocx) in Microsoft Windows 2000 SP3, XP SP2 and Professional, 2003 SP1 allows remote attackers to execu
Noroxi assessment
Priority: Plan (action score 45/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 26.5% (FIRST EPSS); higher than 97.9% of all records.
- According to the record, no fixed version is available yet.
Add it to your regular patch cycle. Update when a fix is released; follow the vendor's advisory.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
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- No fixed version yet
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The HTML Help ActiveX control (Hhctrl.ocx) in Microsoft Windows 2000 SP3, XP SP2 and Professional, 2003 SP1 allows remote attackers to execute arbitrary code via unspecified functions, related to uninitialized parameters.
- Published
- Feb 13, 2007
- Updated
- Jun 16, 2026
- EPSS
- 26.6% · 98th percentile
- CWE
- —
Report tools
Action score
45
Plan
Add it to your regular patch cycle.
- CVSS
- 37 / 40 · 9.3 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 8 / 30 · 26.6%
Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| microsoft | windows 2000 | cpe:2.3:o:microsoft:windows_2000 |
| microsoft | windows 2003 server | cpe:2.3:o:microsoft:windows_2003_server |
| microsoft | windows xp | cpe:2.3:o:microsoft:windows_xp |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- microsoft windows 2000all versions
- microsoft windows 2003 serverall versions
- microsoft windows 2003 server64-bit
- microsoft windows 2003 serveritanium
- microsoft windows 2003 serversp1
- microsoft windows xpall versions
Same product
microsoft: all recordsOther highest-scoring records for the same primary product.
- CVE-2008-4250The Server service in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP1 and SP2, Vista Gold and SP1, Server 2008, and 7 Pre-Beta aKEV99Now
- CVE-2010-0232The kernel in Microsoft Windows NT 3.1 through Windows 7, including Windows 2000 SP4, Windows XP SP2 and SP3, Windows Server 2003 SP2, WindoKEV70This week
- CVE-2005-1983Stack-based buffer overflow in the Plug and Play (PnP) service for Microsoft Windows 2000 and Windows XP Service Pack 1 allows remote attack68This week
- CVE-2001-0241Buffer overflow in Internet Printing ISAPI extension in Windows 2000 allows remote attackers to gain root privileges via a long print reques66This week
- CVE-2006-3439Buffer overflow in the Server Service in Microsoft Windows 2000 SP4, XP SP1 and SP2, and Server 2003 SP1 allows remote attackers, including 65This week
- CVE-2006-4691Stack-based buffer overflow in the NetpManageIPCConnect function in the Workstation service (wkssvc.dll) in Microsoft Windows 2000 SP4 and X64This week
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
If successful
- Confidentiality
- C · data can be read
- Integrity
- C · data or configuration can be modified
- Availability
- C · the service can be disrupted
- Attack complexity
- M
- Confidentiality impact
- C
- Integrity impact
- C
- Availability impact
- C
Weakness class (CWE)
—
CVSS vector
AV:N/AC:M/Au:N/C:C/I:C/A:C
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
- secunia.com/advisories/24136
- www.kb.cert.org/vuls/id/563756
- www.osvdb.org/31884
- www.securityfocus.com/bid/22478
- www.securitytracker.com/id?1017635
- www.us-cert.gov/cas/techalerts/TA07-044A.html
- www.vupen.com/english/advisories/2007/0577
- docs.microsoft.com/en-us/security-updates/securitybulletins/2007/ms07-008
- oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A125
Vendor advisories and official records. Exploit/PoC links are deliberately left out.