{"id":"CVE-2009-0238","published":"2009-02-25T16:30:00Z","modified":"2026-06-16T23:04:33Z","title":"Microsoft Office Remote Code Execution","vendor":"Microsoft","product":"Office","tier":"core","eol":null,"description":{"text":"Microsoft Office Excel 2000 SP3, 2002 SP3, 2003 SP3, and 2007 SP1; Excel Viewer 2003 Gold and SP3; Excel Viewer; Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats SP1; and Excel in Microsoft Office 2004 and 2008 for Mac allow remote attackers to execute arbitrary code via a crafted Excel document that triggers an access attempt on an invalid object, as exploited in the wild in February 2009 by Trojan.Mdropper.AC.","provenance":"source","from":"NVD"},"summary":{"text":"The flaw is a code injection weakness in Microsoft Office Excel, affecting Excel 2000 SP3, 2002 SP3, 2003 SP3 and 2007 SP1, the Excel Viewer releases, the Compatibility Pack for Word, Excel and PowerPoint 2007 file formats SP1, and Excel in Office 2004 and 2008 for Mac. A remote attacker can execute arbitrary code by getting a victim to open a crafted Excel document that triggers an access attempt on an invalid object, and this requires user interaction with the file.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-23T07:12:35Z"},"cvss":{"score":8.8,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","provenance":"source","from":"NVD"},"epss":{"score":0.42941,"percentile":0.98715,"date":"2026-10-28","provenance":"source"},"kev":{"dateAdded":"2026-04-14","dueDate":"2026-04-28","ransomware":false,"requiredAction":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","notes":"https://learn.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-009 ; https://nvd.nist.gov/vuln/detail/CVE-2009-0238","provenance":"source"},"vulncheckKev":{"dateAdded":"2009-02-25","exploitedFirstSeen":"2009-02-25","ransomware":false,"evidence":[{"url":"https://www.cve.org/CVERecord?id=CVE-2009-0238","date":"2009-02-25"},{"url":"https://learn.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-009","date":"2009-04-22"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2026-04-14"}],"evidenceTotal":3,"provenance":"source"},"exploited":true,"otx":{"pulseCount":50,"pulses":[{"name":"Actively_Exploited_Kev | Oct 29, 2026","url":"https://otx.alienvault.com/pulse/6ae20c1db17e7057ae7d9ad1","created":"2026-10-28"},{"name":"Actively_Exploited_Kev | Oct 28, 2026","url":"https://otx.alienvault.com/pulse/6ae0ba7e0e2a97ff7b218819","created":"2026-10-27"},{"name":"Actively_Exploited_Kev | Oct 27, 2026","url":"https://otx.alienvault.com/pulse/6adf68b85c3e852f3c111d18","created":"2026-10-26"},{"name":"Actively_Exploited_Kev | Oct 24, 2026","url":"https://otx.alienvault.com/pulse/6adb740e397c3ad4799aa4cd","created":"2026-10-23"},{"name":"Actively_Exploited_Kev | Oct 23, 2026","url":"https://otx.alienvault.com/pulse/6ada236fcfba2dfa730ea482","created":"2026-10-22"},{"name":"Actively_Exploited_Kev | Oct 22, 2026","url":"https://otx.alienvault.com/pulse/6ad8d33a077cbb5cab524d80","created":"2026-10-21"},{"name":"Actively_Exploited_Kev | Oct 21, 2026","url":"https://otx.alienvault.com/pulse/6ad78130c4d1ac2be83a8b6d","created":"2026-10-20"},{"name":"Actively_Exploited_Kev | Oct 20, 2026","url":"https://otx.alienvault.com/pulse/6ad62f63c24a405a3423cc13","created":"2026-10-19"},{"name":"Actively_Exploited_Kev | Oct 19, 2026","url":"https://otx.alienvault.com/pulse/6ad4dda174e5797d0bd238b7","created":"2026-10-18"},{"name":"Actively_Exploited_Kev | Oct 18, 2026","url":"https://otx.alienvault.com/pulse/6ad38c22e1848f8189d1c121","created":"2026-10-17"}],"provenance":"machine"},"cwes":[{"id":"CWE-94","name":"Improper Control of Generation of Code"}],"references":[{"url":"http://blogs.zdnet.com/security/?p=2658","tags":["Broken Link"]},{"url":"http://isc.sans.org/diary.html?storyid=5923","tags":["Press/Media Coverage"]},{"url":"http://securitytracker.com/id?1021744","tags":["Broken Link"]},{"url":"http://www.microsoft.com/technet/security/advisory/968272.mspx","tags":["Vendor Advisory"]},{"url":"http://www.securityfocus.com/bid/33870","tags":["Broken Link"]},{"url":"http://www.symantec.com/business/security_response/writeup.jsp?docid=2009-022310-4202-99","tags":["Broken Link"]},{"url":"http://www.us-cert.gov/cas/techalerts/TA09-104A.html","tags":["US Government Resource"]},{"url":"http://www.vupen.com/english/advisories/2009/1023","tags":["Broken Link"]},{"url":"https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-009","tags":["Vendor Advisory"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/48875","tags":["Third Party Advisory"]},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5968","tags":["Broken Link"]},{"url":"http://blogs.zdnet.com/security/?p=2658","tags":["Broken Link"]},{"url":"http://isc.sans.org/diary.html?storyid=5923","tags":["Press/Media Coverage"]},{"url":"http://securitytracker.com/id?1021744","tags":["Broken Link"]},{"url":"http://www.microsoft.com/technet/security/advisory/968272.mspx","tags":["Vendor Advisory"]},{"url":"http://www.securityfocus.com/bid/33870","tags":["Broken Link"]},{"url":"http://www.symantec.com/business/security_response/writeup.jsp?docid=2009-022310-4202-99","tags":["Broken Link"]},{"url":"http://www.us-cert.gov/cas/techalerts/TA09-104A.html","tags":["US Government Resource"]},{"url":"http://www.vupen.com/english/advisories/2009/1023","tags":["Broken Link"]},{"url":"https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-009","tags":["Vendor Advisory"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/48875","tags":["Third Party Advisory"]},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5968","tags":["Broken Link"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2009-0238","tags":["US Government Resource"]}],"techniques":[{"id":"T1574.001","name":"DLL","tactics":["execution","stealth"],"provenance":"source","basis":"ctid-cve","bases":["ctid-cve"],"basisDetail":"CTID attack_to_cve (Phase 1)","mappingType":"uncategorized","evidence":[],"confidence":"low","confidenceNote":"CTID attack_to_cve Phase 1 \"Uncategorized\" mapping (not staged by impact)"},{"id":"T1204.002","name":"Malicious File","tactics":["execution"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: User opens crafted document to trigger exploit","mappingType":"exploitation_technique","evidence":[{"from":"description","quote":"via a crafted Excel document that triggers an access attempt","start":288,"end":348}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"},{"id":"T1059","name":"Command and Scripting Interpreter","tactics":["execution"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: Arbitrary code execution is the direct impact","mappingType":"primary_impact","evidence":[{"from":"description","quote":"allow remote attackers to execute arbitrary code","start":239,"end":287}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2009-0246","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2009-0246","exploited":true,"exploitedSince":"2026-04-14","provenance":"source"},"exploits":[],"exploitSources":null,"exploitRefs":[],"flow":[{"stage":"exploitation","techniques":["T1204.002"],"provenance":"ai"},{"stage":"primary","techniques":["T1059"],"provenance":"ai"},{"stage":"related","techniques":["T1574.001"],"provenance":"source","lowConfidence":true}],"timeline":[{"date":"2009-02-25","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2009-0238","provenance":"source"},{"date":"2009-02-25","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://www.cve.org/CVERecord?id=CVE-2009-0238","provenance":"source"},{"date":"2026-04-14","kind":"kev","label":"Added to CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","provenance":"source"},{"date":"2026-04-14","kind":"euvd-exploited","label":"ENISA EUVD: exploited","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2009-0246","provenance":"source"}],"speed":{"daysToPublicExploit":null,"firstExploitFrom":null,"daysToKev":6257},"priority":{"score":63.9,"factors":[{"name":"In a KEV catalog","points":35.0,"detail":"listed in CISA KEV and VulnCheck KEV"},{"name":"Recent KEV listing","points":0.0,"detail":"added 6455 days ago"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":19.74,"detail":"percentile 0.9871"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":0.0,"detail":"none found"},{"name":"Mentioned in OTX pulses","points":3.0,"detail":"50 pulses"},{"name":"CVSS severity","points":6.16,"detail":"base score 8.8"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]},"lineage":{"familyId":"fam-class-microsoft-office-cwe-94"}}