CVE-2007-2903
CVE-2007-2903 is a medium-severity vulnerability in Microsoft Office with a CVSS 2.0 base score of 5.0. Its EPSS exploit-prediction score of 29% places it in the 98th percentile, indicating an elevated likelihood of exploitation.
Key facts
- Severity: Medium (CVSS 2.0 base score 5.0)
- EPSS exploit prediction: 29% (98th percentile)
- Actively exploited: Not listed in CISA KEV
- Affected product: Microsoft Office
- Published:
- Last modified:
Description
Buffer overflow in the HelpPopup method in the Microsoft Office 2000 Controllo UA di Microsoft Office ActiveX control (OUACTRL.OCX) 1.0.1.9 allows remote attackers to cause a denial of service (probably winhlp32.exe crash) via a long first argument. NOTE: it is not clear whether this issue crosses privilege boundaries.
Frequently asked questions
- What is CVE-2007-2903?
- Buffer overflow in the HelpPopup method in the Microsoft Office 2000 Controllo UA di Microsoft Office ActiveX control (OUACTRL.OCX) 1.0.1.9 allows remote attackers to cause a denial of service (probably winhlp32.exe crash) via a long first argument. NOTE: it is not clear whether this issue crosses privilege boundaries.
- How severe is CVE-2007-2903?
- CVE-2007-2903 has a CVSS 2.0 base score of 5.0, rated medium severity.
- Is CVE-2007-2903 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 29% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2007-2903?
- CVE-2007-2903 affects Microsoft Office. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2007-2903?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2007-2903 published?
- CVE-2007-2903 was published on 2007-05-30 and last updated on 2026-06-16.
References
- http://moaxb.blogspot.com/2007/05/moaxb-23-microsoft-office-2000.html
- http://osvdb.org/36034
- http://shinnai.altervista.org/viewtopic.php?id=42&t_id=26
- http://www.securityfocus.com/bid/24118
- http://www.securitytracker.com/id?1018107
- http://www.shinnai.altervista.org/moaxb/20070523/ouactrltxt.html
- https://exchange.xforce.ibmcloud.com/vulnerabilities/34473
Affected products (1)
- cpe:2.3:a:microsoft:office:2000:*:*:*:*:*:*:*
More vulnerabilities in Microsoft Office
- CVE-2007-0065 — Critical (CVSS 10.0): Heap-based buffer overflow in Object Linking and Embedding (OLE) Automation in Microsoft Windows 2000 SP4, XP SP2,…
- CVE-2003-0347 — Critical (CVSS 10.0): Heap-based buffer overflow in VBE.DLL and VBE6.DLL of Microsoft Visual Basic for Applications (VBA) SDK 5.0 through 6.3…
- CVE-2000-0854 — Critical (CVSS 10.0): When a Microsoft Office 2000 document is launched, the directory of that document is first used to locate DLL's such as…
- CVE-2025-53766 — Critical (CVSS 9.8): Heap-based buffer overflow in Windows GDI+ allows an unauthorized attacker to execute code over a network.
- CVE-2023-23397 — Critical (CVSS 9.8): Microsoft Outlook Elevation of Privilege Vulnerability
- CVE-2023-21716 — Critical (CVSS 9.8): Microsoft Word Remote Code Execution Vulnerability