{"cve":"CVE-2014-3347","nvd":{"published":"2014-08-28T23:55:05.513","modified":"2026-06-17T00:08:01.690","status":"Modified","description":"Cisco IOS 15.1(4)M2 on Cisco 1800 ISR devices, when the ISDN Basic Rate Interface is enabled, allows remote attackers to cause a denial of service (device hang) by leveraging knowledge of the ISDN phone number to trigger an interrupt timer collision during entropy collection, leading to an invalid state of the hardware encryption module, aka Bug ID CSCul77897.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-399"],"references":["http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2014-3347","http://tools.cisco.com/security/center/viewAlert.x?alertId=35453","http://www.securityfocus.com/bid/69439","http://www.securitytracker.com/id/1030772","https://exchange.xforce.ibmcloud.com/vulnerabilities/95558"],"products":["cisco:1801_integrated_service_router","cisco:1802_integrated_service_router","cisco:1803_integrated_service_router","cisco:1811_integrated_service_router","cisco:1812_integrated_service_router","cisco:1841_integrated_service_router","cisco:1861_integrated_service_router","cisco:ios"],"source":"nvd","synced_at":"2026-10-19T20:34:04.196504363+00:00"},"epss":{"cve":"CVE-2014-3347","score":0.00976,"percentile":0.62122,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}