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CVE-2009-1134

40
FAUCET Score

CVE-2009-1134 is a critical remote code execution vulnerability affecting Microsoft Excel 2007, Excel Viewer, and the Office Compatibility Pack. It allows attackers to execute arbitrary code by crafting a malicious BIFF file containing a malformed Qsir (0x806) record object, leading to record pointer corruption. With a CVSS score of 9.3, this vulnerability is highly severe, requiring no authentication and having a medium attack complexity. Successful exploitation results in complete compromise of confidentiality, integrity, and availability. Despite its age and high FAUCET risk score of 97/100, there is no evidence of active exploitation, nor are there publicly available exploits in Metasploit or ExploitDB. Community discussion and media coverage for this CVE are also minimal.

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
35.70%
Probability of exploitation in next 30 days
EPSS Percentile
98.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.3570 is in the 96th percentile among its peer group of 8,918 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, 0.1 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

osvdb.org / 54958
docs.microsoft.com / en-us/security-updates/securitybulletins/2009/ms09-021
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5922
securityfocus.com / archive/1/504213/100/0/threaded
securityfocus.com / bid/35246
securitytracker.com / id
us-cert.gov / cas/techalerts/TA09-160A.html
US Government Resource
vupen.com / english/advisories/2009/1540
zerodayinitiative.com / advisories/ZDI-09-040