RCE in Microsoft Office
CVE-2009-0557
Excel in Microsoft Office 2000 SP3, Office XP SP3, Office 2003 SP3, and Office 2004 and 2008 for Mac; Excel in 2007 Microsoft Office System SP1 and SP2; Open XML File Format Converter for Mac; Microsoft Office Excel Viewer 2003 SP3; Microsoft Office Excel Viewer; and Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats SP1 and SP2 allow remote attackers to execute arbitrary code via a crafted Excel file with a malformed record object, aka "Object Record Corruption Vulnerability."
Vulnerability class: RCE (Remote Code Execution)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.530 (99.0th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.586 · newest: 0.530 · change: -0.056
Affected products
- Microsoft Office — versions 2000, 2003, 2004
- Microsoft Office Compatibility Pack — versions 2007
- Microsoft Office Excel Viewer — versions 2003
- Microsoft Office Sharepoint Server — versions 2007
- Microsoft Open XML File Format Converter
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply updates per vendor instructions.
Public proof-of-concept exploits
References
- www.vupen.com/english/advisories/2009/1540 (vdb-entry, Broken Link)
- oval.cisecurity.org/repository/search/definition/oval:org.mitre.oval:def:5564 (Broken Link, signature, vdb-entry)
- www.securitytracker.com/id (VDB Entry, Third Party Advisory, vdb-entry, Broken Link)
- docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-021 (vendor-advisory, Patch, Vendor Advisory)
- osvdb.org/54953 (vdb-entry, Broken Link)
- www.securityfocus.com/bid/35241 (VDB Entry, Third Party Advisory, vdb-entry, Broken Link)
- www.us-cert.gov/cas/techalerts/TA09-160A.html (US Government Resource, Third Party Advisory, Broken Link, third-party-advisory)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
Frequently asked questions
- What is CVE-2009-0557?
- CVE-2009-0557 is a high-severity vulnerability in Microsoft Office, classified under Code Injection. CVSS score: 7.8/10. Published 2009-06-10.
- How severe is CVE-2009-0557?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2009-0557 known to be exploited?
- Yes. CVE-2009-0557 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-06-08), indicating it is being actively exploited. 2 public proof-of-concept repositories are indexed.