{"id":"CVE-2015-1671","published":"2015-05-13T10:59:03Z","modified":"2026-06-17T00:22:47Z","title":"Microsoft Windows Remote Code Execution Vulnerability","vendor":"Microsoft","product":"Windows","tier":"core","eol":null,"description":{"text":"The Windows DirectWrite library, as used in Microsoft .NET Framework 3.0 SP2, 3.5, 3.5.1, 4, 4.5, 4.5.1, and 4.5.2; Office 2007 SP3 and 2010 SP2; Live Meeting 2007 Console; Lync 2010; Lync 2010 Attendee; Lync 2013 SP1; Lync Basic 2013 SP1; Silverlight 5 before 5.1.40416.00; and Silverlight 5 Developer Runtime before 5.1.40416.00, allows remote attackers to execute arbitrary code via a crafted TrueType font, aka \"TrueType Font Parsing Vulnerability.\"","provenance":"source","from":"NVD"},"summary":{"text":"The Windows DirectWrite library, as used in several Microsoft products including .NET Framework, Office, Lync, Live Meeting and Silverlight, contains a TrueType font parsing flaw. An attacker can execute arbitrary code by supplying a crafted TrueType font, with no authentication required but user interaction needed to trigger it.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-23T07:11:22Z"},"cvss":{"score":7.8,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","provenance":"source","from":"NVD"},"epss":{"score":0.48832,"percentile":0.98871,"date":"2026-10-28","provenance":"source"},"kev":{"dateAdded":"2022-05-25","dueDate":"2022-06-15","ransomware":false,"requiredAction":"Apply updates per vendor instructions.","notes":"https://nvd.nist.gov/vuln/detail/CVE-2015-1671","provenance":"source"},"vulncheckKev":{"dateAdded":"2015-11-02","exploitedFirstSeen":"2015-11-02","ransomware":true,"evidence":[{"url":"https://securelist.com/it-threat-evolution-in-q3-2015/72493/","date":"2015-11-02"},{"url":"https://securelist.com/kaspersky-security-bulletin-2015-overall-statistics-for-2015/73038/","date":"2015-12-15"},{"url":"https://cybersecurityworks.com/pdf/ransomware/Spotlight_Ransomware2021.pdf","date":"2021-02-11"},{"url":"https://dl.acm.org/doi/pdf/10.1145/3465481.3465758","date":"2021-08-17"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2022-05-25"}],"evidenceTotal":5,"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-19","name":null}],"references":[{"url":"http://www.securityfocus.com/bid/74490","tags":["Broken Link","Third Party Advisory","VDB Entry"]},{"url":"http://www.securitytracker.com/id/1032281","tags":["Broken Link","Third Party Advisory","VDB Entry"]},{"url":"https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-044","tags":["Patch","Vendor Advisory"]},{"url":"http://www.securityfocus.com/bid/74490","tags":["Broken Link","Third Party Advisory","VDB Entry"]},{"url":"http://www.securitytracker.com/id/1032281","tags":["Broken Link","Third Party Advisory","VDB Entry"]},{"url":"https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-044","tags":["Patch","Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2015-1671","tags":["US Government Resource"]}],"techniques":[{"id":"T1204.002","name":"Malicious File","tactics":["execution"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: victim opens malicious font file","mappingType":"exploitation_technique","evidence":[{"from":"description","quote":"via a crafted TrueType font","start":382,"end":409}],"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: font parsing yields arbitrary code execution","mappingType":"primary_impact","evidence":[{"from":"description","quote":"allows remote attackers to execute arbitrary code","start":332,"end":381}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[{"id":"SRC-93c55e10ab45afc37c85","title":"Microsoft Security","publisher":"download.microsoft.com","url":"https://download.microsoft.com/download/E/B/0/EB0F50CC-989C-4B66-B7F6-68CD3DC90DE3/Microsoft_Security_Intelligence_Report_Volume_21_English.pdf","date":null,"mentions":[{"quote":"vulnerabilities, CVE-2015-1671 and CVE-2016-0034.","start":118236,"end":118285}]}],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2015-1801","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2015-1801","exploited":true,"exploitedSince":"2022-05-25","provenance":"source"},"exploits":[],"exploitSources":null,"exploitRefs":[],"flow":[{"stage":"exploitation","techniques":["T1204.002"],"provenance":"ai"},{"stage":"primary","techniques":["T1059"],"provenance":"ai"}],"timeline":[{"date":"2015-05-13","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2015-1671","provenance":"source"},{"date":"2015-11-02","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://securelist.com/it-threat-evolution-in-q3-2015/72493/","provenance":"source"},{"date":"2022-05-25","kind":"kev","label":"Added to CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","provenance":"source"},{"date":"2022-05-25","kind":"euvd-exploited","label":"ENISA EUVD: exploited","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2015-1801","provenance":"source"}],"speed":{"daysToPublicExploit":null,"firstExploitFrom":null,"daysToKev":2569},"priority":{"score":77.1,"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 4014 days ago"},{"name":"Known ransomware use","points":10.0,"detail":"CISA KEV and VulnCheck KEV: Known"},{"name":"EPSS percentile","points":19.77,"detail":"percentile 0.9887"},{"name":"Named in threat reports","points":3.87,"detail":"1 report"},{"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":5.46,"detail":"base score 7.8"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]}}