CVE-2007-0427

Exp

Stack-based buffer overflow in Microsoft Help Workshop 4.03.0002 allows user-assisted remote attackers to execute arbitrary code via a help project (.HPJ) file with a long HLP field in the OPTIONS section.

Published: 2007-01-23 Last update: 2026-04-23 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2007-0427 is rated High Exploit Risk (88.1/100): CVSS Critical severity, with high exploitation likelihood (EPSS 55.26%, 98th percentile). 4 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +1.61% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2007-0427

EDB-ID Source Kind Published Link
3159 exploit_db edb 2007-01-19 Exploit-DB ↗
3149 exploit_db edb 2007-01-17 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2007-0427

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-04-08 53.64% 55.26% +1.61%
2 2025-11-03 54.29% 53.64% -0.65%
3 2025-09-11 — 54.29% —

Full EPSS history (19 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2007-0427

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.3 2.0 HIGH
AV:N/AC:M/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 8.6 10.0 [email protected]

Weakness enumeration for CVE-2007-0427

Affected software / configurations for CVE-2007-0427

Vendor Product Version Raw CPE
microsoft html_help_workshop 4.03.0002 cpe:2.3:a:microsoft:html_help_workshop:4.03.0002:*:*:*:*:*:*:*

References for CVE-2007-0427

cvelogic Threat Intelligence