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CVE-2009-0559

37
FAUCET Score

CVE-2009-0559 describes a critical stack-based buffer overflow vulnerability in Microsoft Excel 2000 SP3 and Office XP SP3, affecting various Microsoft Office products including Excel Viewer and SharePoint Server. This flaw allows remote attackers to execute arbitrary code by enticing a user to open a specially crafted Excel file containing a malformed record object. With a CVSS score of 9.3, it presents a high severity risk due to its network-based attack vector, low authentication requirements, and complete compromise of confidentiality, integrity, and availability. Despite its age and high EPSS score, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
2004CPE matchmatch criteria
cpe:2.3:a:microsoft:office:2004:*:mac:*:*:*:*:*
2008CPE matchmatch criteria
cpe:2.3:a:microsoft:office:2008:*:mac:*:*:*:*:*
xpCPE matchmatch criteria
cpe:2.3:a:microsoft:office:xp:sp3:*:*:*:*:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:a:microsoft:office_compatibility_pack_for_word_excel_ppt_2007:*:sp1:*:*:*:*:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:a:microsoft:office_compatibility_pack_for_word_excel_ppt_2007:*:sp2:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

9.3HIGH

AV:N/AC:M/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
29.44%
Probability of exploitation in next 30 days
EPSS Percentile
98.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.2944 is in the 93rd percentile among its peer group of 8,914 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

docs.microsoft.com / en-us/security-updates/securitybulletins/2009/ms09-021
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6273
securityfocus.com / bid/35243
securitytracker.com / id
us-cert.gov / cas/techalerts/TA09-160A.html
US Government Resource
vupen.com / english/advisories/2009/1540