CVE-2009-1134

Office vulnerability

CVSS

9.3

EPSS

35.7%

EPSS pct

98th

Exploited

No known

Excel in 2007 Microsoft Office System SP1 and SP2; 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 BIFF file with a malformed Qsir (0x806) record object, aka "Record Pointer Corruption Vulnerability."

Affected vendor

Microsoft

Affected product

Office

CVSS vector

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

Weakness type (CWE)

CWE-94 — Code Injection

Published

2009-06-10

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, medium attack complexity, requiring no authentication. Successful exploitation leads to complete impact to confidentiality, complete impact to integrity, complete impact to availability.

Its EPSS score of 35.7% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 98% of all scored CVEs.

Check your external exposure to CVE-2009-1134

Confirm whether Microsoft Office is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2009-1134.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2009-1134

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2009-1134 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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