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."
CVE-2009-1134
HIGHCVSS v2 · 9.39.3—Elevated
EchelonGraph scoreLOW confidence
This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 9.3 — v2 rates that HIGH (v2 bands: LOW 0.0–3.9 / MEDIUM 4.0–6.9 / HIGH 7.0–10.0; v2 has no CRITICAL band). Vector AV:N/AC:M/Au:N/C:C/I:C/A:C. CVSS v2 is an older, coarser metric than v3.1/v4.0 (no Scope, no User Interaction, no Attack Requirements), so it is not directly comparable to a v3 or v4 score. NVD has never re-scored this record under v3. EPSS predicts 35.7% exploitation probability in the next 30 days, which is reflected in EG Risk but does not lift the v2 base. Confidence: LOW.
Sources: epss, nvd_v2
9.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 36%CVSS v2: 9.3Exploit: Elevated riskExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v2.0 (legacy)
- 9.3HIGHNVD never assigned a CVSS v3 rating to this CVE
- EG Score
- 9.3(low)
- EG Risk
- 62(Track)EG Risk 62/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity93% × 45%Exploitation40% × 40%Automatability30% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 36%
- EPSS %ILE
- 98%
- KEV
- Not listed
Published
June 10, 2009
Last Modified
April 23, 2026
References (18)
- secure@microsofthttp://osvdb.org/54958
- secure@microsofthttp://www.securityfocus.com/archive/1/504213/100/0/threaded
- secure@microsofthttp://www.securityfocus.com/bid/35246
- secure@microsofthttp://www.securitytracker.com/id?1022351
- secure@microsofthttp://www.us-cert.gov/cas/techalerts/TA09-160A.html
- secure@microsofthttp://www.vupen.com/english/advisories/2009/1540
- secure@microsofthttp://www.zerodayinitiative.com/advisories/ZDI-09-040/
- secure@microsofthttps://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-021
- secure@microsofthttps://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5922
- af854a3a-2127-422b-91ae-364da2661108http://osvdb.org/54958
- af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/archive/1/504213/100/0/threaded
- af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/35246
- af854a3a-2127-422b-91ae-364da2661108http://www.securitytracker.com/id?1022351
- af854a3a-2127-422b-91ae-364da2661108http://www.us-cert.gov/cas/techalerts/TA09-160A.html
- af854a3a-2127-422b-91ae-364da2661108http://www.vupen.com/english/advisories/2009/1540
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Frequently asked(4)
What is CVE-2009-1134?
CVE-2009-1134 is a high vulnerability published on June 10, 2009. 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…
When was CVE-2009-1134 disclosed?
CVE-2009-1134 was first published in the National Vulnerability Database on June 10, 2009, with the most recent update on April 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2009-1134 actively exploited?
CVE-2009-1134 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 36% probability of exploitation in the next 30 days, which ranks it in the top 1.6% of all scored CVEs.
How do I remediate CVE-2009-1134?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2009-1134, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
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