Microsoft Office Excel Remote Code Execution
CVE-2007-0671 is a high-severity vulnerability in Access from Microsoft, with a CVSS 2.0 base score of 9.3 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected Access versions: 2000; 2002; 2003. The record does not name a fixed version, so check the vendor advisory. CISA added it to the Known Exploited Vulnerabilities catalogue on August 12, 2025, which means attacks have been observed in the wild.
Attackers are already exploiting this vulnerability, according to CISA.
What to do
- Check which version of Access you run against the affected versions below, and install the vendor's latest release.
- CISA's required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- Read the advisory on vupen.com for workarounds and exact fixed builds.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Microsoft | Access | 2000; 2002; 2003 | Not stated |
| Microsoft | Excel | 2000; 2002; 2003 | Not stated |
| Microsoft | Excel Viewer | 2003 | Not stated |
| Microsoft | Frontpage | 2000; 2002; 2003 | Not stated |
| Microsoft | Infopath | 2003 | Not stated |
| Microsoft | Office | 2000; 2003; 2004; xp | Not stated |
| Microsoft | Onenote | 2003 | Not stated |
| Microsoft | Outlook | 2000; 2002; 2003 | Not stated |
| Microsoft | Powerpoint | 2000; 2002; 2003 | Not stated |
| Microsoft | Project | 2000; 2002; 2003 | Not stated |
| Microsoft | Publisher | 2000; 2002; 2003 | Not stated |
| Microsoft | Visio | 2002; 2003 | Not stated |
| Microsoft | Word | 2000; 2002; 2003 | Not stated |
| Microsoft | Word Viewer | 2003 | Not stated |
Version data comes from NVD's product matching. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Access vector
- NetworkCan be exploited remotely over a network.
- Access complexity
- MediumSome conditions must be met.
- Authentication
- NoneNo login is needed.
- Confidentiality
- CompleteAll data can be read.
- Integrity
- CompleteAny data can be modified.
- Availability
- CompleteThe system can be shut down completely.
Vector: AV:N/AC:M/Au:N/C:C/I:C/A:C. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 8.8 | High | CISA (ADP) |
| CVSS 2.0 | 9.3 | High | NVD |
Official description
Unspecified vulnerability in Microsoft Excel 2000, XP, 2003, and 2004 for Mac, and possibly other Office products, allows remote user-assisted attackers to execute arbitrary code via unknown attack vectors, as demonstrated by Exploit-MSExcel.h in targeted zero-day attacks.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: active, automatable: no, technical impact: total).
- Added to CISA's Known Exploited Vulnerabilities catalogue.
- Deadline for US federal agencies to remediate, set by CISA.
- Record last changed materially (score, affected products, status or references).
References
Advisories
Third-party and government advisories
- kb.cert.org/vuls/id/613740US Government Resource
- exchange.xforce.ibmcloud.com/vulnerabilities/32178Third Party Advisory
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2007-0671US Government Resource
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